Before restart when shortcuts are configured and works fine:
xfconf-query -c xfce4-keyboard-shortcuts -lv | grep xfwm4
/xfwm4/custom/<Alt><Control>End            move_window_next_workspace_key
/xfwm4/custom/<Alt><Control>Home           move_window_prev_workspace_key
/xfwm4/custom/<Alt><Control>KP_1           move_window_workspace_1_key
/xfwm4/custom/<Alt><Control>KP_2           move_window_workspace_2_key
/xfwm4/custom/<Alt><Control>KP_3           move_window_workspace_3_key
/xfwm4/custom/<Alt><Control>KP_4           move_window_workspace_4_key
/xfwm4/custom/<Alt><Control>KP_5           move_window_workspace_5_key
/xfwm4/custom/<Alt><Control>KP_6           move_window_workspace_6_key
/xfwm4/custom/<Alt><Control>KP_7           move_window_workspace_7_key
/xfwm4/custom/<Alt><Control>KP_8           move_window_workspace_8_key
/xfwm4/custom/<Alt><Control>KP_9           move_window_workspace_9_key
/xfwm4/custom/<Alt>Delete                  del_workspace_key
/xfwm4/custom/<Alt>F10                     maximize_window_key
/xfwm4/custom/<Alt>F11                     fullscreen_key
/xfwm4/custom/<Alt>F12                     above_key
/xfwm4/custom/<Alt>F4                      close_window_key
/xfwm4/custom/<Alt>F5                      maximize_horiz_key
/xfwm4/custom/<Alt>F6                      maximize_vert_key
/xfwm4/custom/<Alt>F7                      maximize_window_key
/xfwm4/custom/<Alt>F8                      stick_window_key
/xfwm4/custom/<Alt>F9                      hide_window_key
/xfwm4/custom/<Alt>Insert                  add_workspace_key
/xfwm4/custom/<Alt><Shift>Tab              cycle_reverse_windows_key
/xfwm4/custom/<Alt>space                   popup_menu_key
/xfwm4/custom/<Alt>Tab                     cycle_windows_key
/xfwm4/custom/<Control><Alt>d              show_desktop_key
/xfwm4/custom/<Control><Alt>Down           down_workspace_key
/xfwm4/custom/<Control><Alt>Left           left_workspace_key
/xfwm4/custom/<Control><Alt>Right          right_workspace_key
/xfwm4/custom/<Control><Alt>Up             up_workspace_key
/xfwm4/custom/<Control>F11                 workspace_11_key
/xfwm4/custom/<Control>F12                 workspace_12_key
/xfwm4/custom/<Control><Shift><Alt>Left    move_window_left_key
/xfwm4/custom/<Control><Shift><Alt>Right   move_window_right_key
/xfwm4/custom/<Control><Shift><Alt>Up      move_window_up_key
/xfwm4/custom/Down                         down_key
/xfwm4/custom/Escape                       cancel_key
/xfwm4/custom/Left                         left_key
/xfwm4/custom/override                     true
/xfwm4/custom/<Primary><Alt>d              show_desktop_key
/xfwm4/custom/<Primary><Alt>Down           down_workspace_key
/xfwm4/custom/<Primary><Alt>End            move_window_next_workspace_key
/xfwm4/custom/<Primary><Alt>Home           move_window_prev_workspace_key
/xfwm4/custom/<Primary><Alt>KP_1           move_window_workspace_1_key
/xfwm4/custom/<Primary><Alt>KP_2           move_window_workspace_2_key
/xfwm4/custom/<Primary><Alt>KP_3           move_window_workspace_3_key
/xfwm4/custom/<Primary><Alt>KP_4           move_window_workspace_4_key
/xfwm4/custom/<Primary><Alt>KP_5           move_window_workspace_5_key
/xfwm4/custom/<Primary><Alt>KP_6           move_window_workspace_6_key
/xfwm4/custom/<Primary><Alt>KP_7           move_window_workspace_7_key
/xfwm4/custom/<Primary><Alt>KP_8           move_window_workspace_8_key
/xfwm4/custom/<Primary><Alt>KP_9           move_window_workspace_9_key
/xfwm4/custom/<Primary><Alt>Left           left_workspace_key
/xfwm4/custom/<Primary><Alt>Right          right_workspace_key
/xfwm4/custom/<Primary><Alt>Up             up_workspace_key
/xfwm4/custom/<Primary>F1                  workspace_1_key
/xfwm4/custom/<Primary>F11                 workspace_11_key
/xfwm4/custom/<Primary>F12                 workspace_12_key
/xfwm4/custom/<Primary>F2                  workspace_2_key
/xfwm4/custom/<Primary>F3                  workspace_3_key
/xfwm4/custom/<Primary>F5                  workspace_5_key
/xfwm4/custom/<Primary>F7                  workspace_7_key
/xfwm4/custom/<Primary>KP_0                workspace_1_key
/xfwm4/custom/<Primary>KP_1                workspace_2_key
/xfwm4/custom/<Primary>KP_2                workspace_3_key
/xfwm4/custom/<Primary>KP_3                workspace_4_key
/xfwm4/custom/<Primary>KP_4                workspace_5_key
/xfwm4/custom/<Primary>KP_5                workspace_6_key
/xfwm4/custom/<Primary>KP_6                workspace_7_key
/xfwm4/custom/<Primary>KP_7                workspace_8_key
/xfwm4/custom/<Primary>KP_8                workspace_9_key
/xfwm4/custom/<Primary>KP_9                workspace_10_key
/xfwm4/custom/<Primary><Shift><Alt>Left    move_window_left_key
/xfwm4/custom/<Primary><Shift><Alt>Right   move_window_right_key
/xfwm4/custom/<Primary><Shift><Alt>Up      move_window_up_key
/xfwm4/custom/Right                        right_key
/xfwm4/custom/<Shift><Alt>Page_Down        lower_window_key
/xfwm4/custom/<Shift><Alt>Page_Up          raise_window_key
/xfwm4/custom/<Super>Tab                   switch_window_key
/xfwm4/custom/Up                           up_key
/xfwm4/default/<Alt>Delete                 del_workspace_key
/xfwm4/default/<Alt>F10                    maximize_window_key
/xfwm4/default/<Alt>F11                    fullscreen_key
/xfwm4/default/<Alt>F12                    above_key
/xfwm4/default/<Alt>F4                     close_window_key
/xfwm4/default/<Alt>F6                     stick_window_key
/xfwm4/default/<Alt>F7                     move_window_key
/xfwm4/default/<Alt>F8                     resize_window_key
/xfwm4/default/<Alt>F9                     hide_window_key
/xfwm4/default/<Alt>Insert                 add_workspace_key
/xfwm4/default/<Alt><Shift>Tab             cycle_reverse_windows_key
/xfwm4/default/<Alt>space                  popup_menu_key
/xfwm4/default/<Alt>Tab                    cycle_windows_key
/xfwm4/default/Down                        down_key
/xfwm4/default/Escape                      cancel_key
/xfwm4/default/Left                        left_key
/xfwm4/default/<Primary><Alt>d             show_desktop_key
/xfwm4/default/<Primary><Alt>Down          down_workspace_key
/xfwm4/default/<Primary><Alt>End           move_window_next_workspace_key
/xfwm4/default/<Primary><Alt>Home          move_window_prev_workspace_key
/xfwm4/default/<Primary><Alt>KP_1          move_window_workspace_1_key
/xfwm4/default/<Primary><Alt>KP_2          move_window_workspace_2_key
/xfwm4/default/<Primary><Alt>KP_3          move_window_workspace_3_key
/xfwm4/default/<Primary><Alt>KP_4          move_window_workspace_4_key
/xfwm4/default/<Primary><Alt>KP_5          move_window_workspace_5_key
/xfwm4/default/<Primary><Alt>KP_6          move_window_workspace_6_key
/xfwm4/default/<Primary><Alt>KP_7          move_window_workspace_7_key
/xfwm4/default/<Primary><Alt>KP_8          move_window_workspace_8_key
/xfwm4/default/<Primary><Alt>KP_9          move_window_workspace_9_key
/xfwm4/default/<Primary><Alt>Left          left_workspace_key
/xfwm4/default/<Primary><Alt>Right         right_workspace_key
/xfwm4/default/<Primary><Alt>Up            up_workspace_key
/xfwm4/default/<Primary>F1                 workspace_1_key
/xfwm4/default/<Primary>F10                workspace_10_key
/xfwm4/default/<Primary>F11                workspace_11_key
/xfwm4/default/<Primary>F12                workspace_12_key
/xfwm4/default/<Primary>F2                 workspace_2_key
/xfwm4/default/<Primary>F3                 workspace_3_key
/xfwm4/default/<Primary>F4                 workspace_4_key
/xfwm4/default/<Primary>F5                 workspace_5_key
/xfwm4/default/<Primary>F6                 workspace_6_key
/xfwm4/default/<Primary>F7                 workspace_7_key
/xfwm4/default/<Primary>F8                 workspace_8_key
/xfwm4/default/<Primary>F9                 workspace_9_key
/xfwm4/default/<Primary><Shift><Alt>Left   move_window_left_key
/xfwm4/default/<Primary><Shift><Alt>Right  move_window_right_key
/xfwm4/default/<Primary><Shift><Alt>Up     move_window_up_key
/xfwm4/default/Right                       right_key
/xfwm4/default/<Shift><Alt>Page_Down       lower_window_key
/xfwm4/default/<Shift><Alt>Page_Up         raise_window_key
/xfwm4/default/<Super>Tab                  switch_window_key
/xfwm4/default/Up                          up_key

After restart:
xfconf-query -c xfce4-keyboard-shortcuts -lv | grep xfwm4
/xfwm4/default/<Alt>Delete                 del_workspace_key
/xfwm4/default/<Alt>F10                    maximize_window_key
/xfwm4/default/<Alt>F11                    fullscreen_key
/xfwm4/default/<Alt>F12                    above_key
/xfwm4/default/<Alt>F4                     close_window_key
/xfwm4/default/<Alt>F6                     stick_window_key
/xfwm4/default/<Alt>F7                     move_window_key
/xfwm4/default/<Alt>F8                     resize_window_key
/xfwm4/default/<Alt>F9                     hide_window_key
/xfwm4/default/<Alt>Insert                 add_workspace_key
/xfwm4/default/<Alt><Shift>Tab             cycle_reverse_windows_key
/xfwm4/default/<Alt>space                  popup_menu_key
/xfwm4/default/<Alt>Tab                    cycle_windows_key
/xfwm4/default/Down                        down_key
/xfwm4/default/Escape                      cancel_key
/xfwm4/default/Left                        left_key
/xfwm4/default/<Primary><Alt>d             show_desktop_key
/xfwm4/default/<Primary><Alt>Down          down_workspace_key
/xfwm4/default/<Primary><Alt>End           move_window_next_workspace_key
/xfwm4/default/<Primary><Alt>Home          move_window_prev_workspace_key
/xfwm4/default/<Primary><Alt>KP_1          move_window_workspace_1_key
/xfwm4/default/<Primary><Alt>KP_2          move_window_workspace_2_key
/xfwm4/default/<Primary><Alt>KP_3          move_window_workspace_3_key
/xfwm4/default/<Primary><Alt>KP_4          move_window_workspace_4_key
/xfwm4/default/<Primary><Alt>KP_5          move_window_workspace_5_key
/xfwm4/default/<Primary><Alt>KP_6          move_window_workspace_6_key
/xfwm4/default/<Primary><Alt>KP_7          move_window_workspace_7_key
/xfwm4/default/<Primary><Alt>KP_8          move_window_workspace_8_key
/xfwm4/default/<Primary><Alt>KP_9          move_window_workspace_9_key
/xfwm4/default/<Primary><Alt>Left          left_workspace_key
/xfwm4/default/<Primary><Alt>Right         right_workspace_key
/xfwm4/default/<Primary><Alt>Up            up_workspace_key
/xfwm4/default/<Primary>F1                 workspace_1_key
/xfwm4/default/<Primary>F10                workspace_10_key
/xfwm4/default/<Primary>F11                workspace_11_key
/xfwm4/default/<Primary>F12                workspace_12_key
/xfwm4/default/<Primary>F2                 workspace_2_key
/xfwm4/default/<Primary>F3                 workspace_3_key
/xfwm4/default/<Primary>F4                 workspace_4_key
/xfwm4/default/<Primary>F5                 workspace_5_key
/xfwm4/default/<Primary>F6                 workspace_6_key
/xfwm4/default/<Primary>F7                 workspace_7_key
/xfwm4/default/<Primary>F8                 workspace_8_key
/xfwm4/default/<Primary>F9                 workspace_9_key
/xfwm4/default/<Primary><Shift><Alt>Left   move_window_left_key
/xfwm4/default/<Primary><Shift><Alt>Right  move_window_right_key
/xfwm4/default/<Primary><Shift><Alt>Up     move_window_up_key
/xfwm4/default/Right                       right_key
/xfwm4/default/<Shift><Alt>Page_Down       lower_window_key
/xfwm4/default/<Shift><Alt>Page_Up         raise_window_key
/xfwm4/default/<Super>Tab                  switch_window_key
/xfwm4/default/Up                          up_key