Ok, seems like Guake got some issues
it happens from time to time

$ guake --version
Guake Terminal: 3.8.5
VTE: 0.68.0
VTE runtime: 0.68.0
Gtk: 3.24.33


/var/log/syslog:May 16 23:35:15 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 16 23:37:13 graf gnome-shell[3646]: libinput error: event16 - Bartosz Woronicz’s Keyboard: client bug: event processing lagging behind by 33ms, your system is too slow
/var/log/syslog:May 16 23:37:32 graf gnome-shell[4011]: Key repeat discarded, Wayland compositor doesn't seem to be processing events fast enough!
/var/log/syslog:May 16 23:39:05 graf gnome-shell[3646]: Unhandled promise rejection. To suppress this warning, add an error handler to your promise chain with .catch() or a try-catch block around your await expression. Stack trace of the failed promise:#012  _loadFile@resource:///org/gnome/shell/ui/background.js:488:20#012  _load@resource:///org/gnome/shell/ui/background.js:518:14#012  _init@resource:///org/gnome/shell/ui/background.js:278:14#012  Background@resource:///org/gnome/shell/ui/background.js:234:4#012  getBackground@resource:///org/gnome/shell/ui/background.js:622:30#012  _createBackgroundActor@resource:///org/gnome/shell/ui/background.js:793:49#012  _updateBackgroundActor@resource:///org/gnome/shell/ui/background.js:765:39#012  _createBackgroundActor/changeSignalId<@resource:///org/gnome/shell/ui/background.js:821:18#012  _emitChangedSignal/this._changedIdleId<@resource:///org/gnome/shell/ui/background.js:311:18
/var/log/syslog:May 16 23:45:07 graf gnome-shell[3646]: Unhandled promise rejection. To suppress this warning, add an error handler to your promise chain with .catch() or a try-catch block around your await expression. Stack trace of the failed promise:#012  _loadFile@resource:///org/gnome/shell/ui/background.js:488:20#012  _load@resource:///org/gnome/shell/ui/background.js:518:14#012  _init@resource:///org/gnome/shell/ui/background.js:278:14#012  Background@resource:///org/gnome/shell/ui/background.js:234:4#012  getBackground@resource:///org/gnome/shell/ui/background.js:622:30#012  _createBackgroundActor@resource:///org/gnome/shell/ui/background.js:793:49#012  _updateBackgroundActor@resource:///org/gnome/shell/ui/background.js:765:39#012  _createBackgroundActor/changeSignalId<@resource:///org/gnome/shell/ui/background.js:821:18#012  _emitChangedSignal/this._changedIdleId<@resource:///org/gnome/shell/ui/background.js:311:18
/var/log/syslog:May 16 23:48:25 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 16 23:50:02 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 16 23:54:34 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 17 00:00:56 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 17 00:01:37 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 17 00:02:07 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 17 00:03:15 graf gnome-shell[4011]: Key repeat discarded, Wayland compositor doesn't seem to be processing events fast enough!
/var/log/syslog:May 17 00:06:38 graf gnome-shell[3646]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b
/var/log/syslog:May 17 00:08:49 graf gnome-shell[3646]: message repeated 2 times: [ Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0xa0000b]


$ xwininfo -id 0xa0000b

xwininfo: Window id: 0xa0000b "Guake!"

  Absolute upper-left X:  0
  Absolute upper-left Y:  54
  Relative upper-left X:  0
  Relative upper-left Y:  54
  Width: 3840
  Height: 2106
  Depth: 32
  Visual: 0x350
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0xa00002 (not installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +0+54  -3840+54  -3840-0  +0-0
  -geometry 1920x1053+0-0