SUMMARY
I'm using Latte master on Wayland on NixOS unstable (notice this is a little different from other systems, so I hope it's not a packaging issue), with a top bar with utilities, and a bottom bar with launchers and a couple widgets. I have a weird issue: I can't launch nor activate programs by clicking on launchers.

After hovering, on first left-click, I can see a darkening effect on icon, but no bounce nor app. Later clicks while still hovering don't cause this effect anymore until leaving and hovering again. Ctrl+Left-click doesn't work. Left-click on widgets on the same and other bar works and activate the respective widgets. Scrolling up over the launcher DOES launch the app though, and is my current workaround. Right-click works as intended. Tested this with a fresh user, same issue. It does not occur on X11 on the same system.

Any idea what can be causing this only on Wayland?
Thank you very much in advance.


STEPS TO REPRODUCE
1. Launch fresh Latte master on NixOS Wayland (bottom dock with some launchers)
2. Left-click on Dolphin to try to launch it

OBSERVED RESULT
Icon gets darken effect on first click, then nothing, no bounce, no app launched, no darkening on new clicks until leaving and hovering again. Launcher gets properly activated if scroll-up instead.

EXPECTED RESULT
App gets launched, or switched on left-click

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS unstable (reported as 22.05)
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3