SUMMARY
When using the application menu, searching for something and pressing backspace on the keyboard, the focus is initially in the result list of files/programs. This means to delete a character, you have to press backspace twice. Once to get the focus back into the text field and then again to actually remove the last character. So when you want to delete 2 characters you have to press backspace 4 times 

STEPS TO REPRODUCE
1. Search for something that returns at least one result
2. Press backspace (the last character will not be deleted, instead the focus goes back into the input field)
3. Press backspace again (now the character will be removed)
4. Now the focus is back in the result list, because there is still an item matching the search
5. Press backspace again and the last character will again not be deleted. Instead the focus switches back to the input field

OBSERVED RESULT
I have to press backspace 4 times to delete 2 characters.

EXPECTED RESULT
I only have to press backspace 2 times to delete 2 characters, while there is an item in the result list

SOFTWARE/OS VERSIONS
Operating System: Nobara Linux 41
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Kernel Version: 6.12.11-204.nobara.fc41.x86_64 (64-bit)
Graphics Platform: Wayland
System Version: 1.0