I'm not sure I'm seeing the problem as described but testing Xubuntu 17.10 32-bit and 64-bit live ISOs I can certainly confirm that I am not *always* able to change the status of the checkboxes. A logout and login or a restart of the panel seems to restore correct operation.
I'm not sure I'm seeing the problem as described but testing Xubuntu 17.10 32-bit and 64-bit live ISOs I can certainly confirm that I am not *always* able to change the status of the checkboxes. A logout and login or a restart of the panel seems to restore correct operation.