Created attachment 171094 [details]
GIF of the Bug

SUMMARY
When Alt+Tab is pressed, the current window doesn't get out of focus and when Alt+tab+tab is pressed, one tab will be registered on the current window. If tab is pressed N times with Alt key, the current window will register N-1 times of tabs.

STEPS TO REPRODUCE (Please find the attached GIF)
1. Open 3–4 applications
2. If one application is a text editor, place the cursor in between text, and press Alt+tab, without leaving the Alt key. 

EXPECTED RESULT
The current window should immediately get out of focus when Alt+tab is pressed. 

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 40
KDE Plasma Version: 6.1.1
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.1
Kernel Version: 6.8.11-300.fc40.x86_64 (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION
I tested with different Windows activation policy and visualization options, the bug remained consistent.
I observed this bug after updating from Fedora 39 to 40.