Hello @undeference, this sounds like the same issue as #5584. When the issue shows itself, can you run xwininfo, click on the affected spot and confirm it has a similar readout as the existing issue?
Perhaps
xwininfo: Please select the window about which you
would like information by clicking the
mouse in that window.
xwininfo: Window id: 0x5400106 (has no name)
Absolute upper-left X: 0
Absolute upper-left Y: 0
Relative upper-left X: 0
Relative upper-left Y: 0
Width: 64
Height: 24
Depth: 24
Visual: 0x31c
Visual Class: TrueColor
Border width: 0
Class: InputOutput
Colormap: 0x5400105 (not installed)
Bit Gravity State: NorthWestGravity
Window Gravity State: NorthWestGravity
Backing Store State: NotUseful
Save Under State: yes
Map State: IsViewable
Override Redirect State: yes
Corners: +0+0 -1302+0 -1302-744 +0-744
-geometry 64x24+0+0
Nothing extracted yet.
Your system information
Please describe your issue in as much detail as possible:
Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist
When clicking on the top left corner of my top panel (in MATE with Compiz), the buttons should behave properly. After the Steam chat window opens, the top left of my top panel does not respond. Closing the window makes no difference. Moving the panel makes no difference. Only quitting Steam makes a difference.
Steps for reproducing this issue:
About 50% of the time, the buttons will stop working.