Unable to move applications into workspace that contains a fullscreen application

[lpaulino07]

• Sway Version:
  1.10-dev-d417a8fc

• Debug Log:
  sway log

• Description:
  Assuming 2 workspaces on 2 monitors. If workspace 2 has a fullscreen application, trying to move any application from workspace 1 to workspace 2 will yield some weird behavior. In theory, application has moved to workspace 2, since it can no longer be interacted with in workspace 1, but its surface is still rendered on workspace 1. This is fixed by either hiding workspace 2 (changing monitor 2 to workspace 3) or by removing fullscreen mode from the application on workspace 2.

Tried with EGL rendered as well just to confirm it wasn't Vulkan related. Also tried with sway 1.10 stable, same behavior.

• Example 1

Moved alacritty to workspace that contains a fullscreen application. Second application (zen browser) acts like alacritty is no longer in the workspace, but alacritty is still being rendered.

• Example 2

Zen browser is moved, alacritty acts like zen browser is no longer there, but zen browser is still being rendered.

[lpaulino07]

Also, this is a multi-GPU setup where monitor 1 is using iGPU and monitor 2 is using dGPU.

[sahinf]

I've been trying to dig at this to no avail. However, my testing confirms that the issue is

1. not strictly multi-GPU
   I run into it on single integrated intel GPU
2. strictly multi-monitor related
   Moving a container to a full screened workspace within the same output/monitor behaves as expected: no ghost image is left rendered on the original workspace.
   I only run into it when the target fullscreened workspace is on another output/monitor.

Also my keyboard events do not go through the glitched out application, but mouse events do.