SUMMARY It seems that with 5.18 release system tray icon positions are not being kept in one spot in between logins. Not sure if my system is the only which is acting up. Problems it is causing for me: - Unable to predict where sound icon will be, messing with muscle memory, makes it harder to hit. It used to always reside right next to the clock. - Player icon, now it's useless for my use case, because I can't predict where I'm going to hit before looking at it, and that bastard seems to always sit somewhere random. Just generally no longer am I able to use muscle memory to quickly find and aim at icons.
If the icons were staying in the same place for you before, it was probably pure chance. We have fixed this in the correct way for Plasma 5.19 so now they *actually* stay in one place and don't periodically move around.