If two Kickoff Application Launchers are used, the wrong search bar may be used.
This appears only to be the case if both Launchers have been open at least once.
Here is a video to show the bug on my system:
STEPS TO REPRODUCE
1. Have two different Application Launcher Applets
2. Open both at least once
3. Try to search for an app on one or the other of these two
The selected search field is in the hidden launcher.
The selected search field should be in the shown launcher.
Linux Kernel Version: 5.15.7-1-MANJARO (64-bit)
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
*** This bug has been marked as a duplicate of bug 443131 ***