Mouse events ignored by application only when managed by Awesome

[zenmaster3000]

Output of awesome --version:
awesome v4.3 (Too long)
• Compiled against Lua 5.3.6 (running with Lua 5.3)
• D-Bus support: ✔
• execinfo support: ✔
• xcb-randr version: 1.6
• LGI version: 0.9.2

How to reproduce the issue:

1. Get the TOTK Optimizer as AppImage
2. chmod a+x the file to be able to launch it.
3. Launch the program.
4. Try to press the image buttons (Graphics, Advanced, Apply, Launch, Extract).

Actual result:

Button press is ignored, a workaround is possible by pressing Shift+Click

Expected result:

Button presses should be passed to the application.

Note: This appears to be similar to what happens to Polybar and I have confirmed that forcing the override redirect flag will allow the buttons to be pressed normally.