Partial loss of mouse/keyboard control when closing Firefox Picture-in-Picture

[podiki]

I'm not sure what could be causing this, but the ingredients seem to be: Firefox Picture-in-Picture window (e.g. pop-out a YouTube video), float-this and toggle-always-show, and :click for the mouse policy. Here is the reproducer I narrowed down as much as I could:

config:

(in-package :stumpwm)
(setf *mouse-focus-policy* :click)

Procedure:

1. Start stumpwm (I'm just running the binary of latest release version)
2. Have at least 2 groups (so with the plain config above C-t g c to create a new one)
3. Open Firefox (I used C-t !)
4. Find a YouTube video and play
5. Press the "pop-out" button to have the video in a new window
6. float-this for this window, resize (probably not necessary)
7. toggle-always-show on this window
8. Verify this video window is in the other group and switch back (to check)
9. Press the grey 'X' button on the pop-out player
10. Observe that Firefox doesn't respond to mouse events, but does to keyboard. Also seems like stumpwm doesn't respond to some keys; perhaps other weirdnes
11. If you float-this the Firefox window, it will behave normally

So, seems like mouse/keyboard focus or control, along with display refreshes (to Firefox) gets wonky. Something about the mouse policy and a floating window? Either way, this puts stumpwm in a weird state.

[ghost-of-freedom]

i remember that either toggle-always-show or toggle-always-on-top was so buggy for me it was pretty much unusable. does this happen if you skip toggling toggle-always-show on the window?

[podiki]

In my test right now, it did not happen without toggle-always-show. So I think it is a weird combination of that, perhaps floating, and maybe the type of window Firefox's Picture-in-Picture is?

I'll have to try with other types of windows and see what the factors are we can eliminate.