Created attachment 150257 [details]
Screenshot. Applets shoud neither by transparent, nor have this grey effect behind them.
With Plasma 5.25 the buggy applets after suspend returned (see screenshots below). I haven't seen it for a long time, with the update to Plasma 5.25 they returned. If you logout and login again it's fixed. Replacing Plasmashell (plasmashell --replace) doesn't work.
STEPS TO REPRODUCE
1. Update to Plasma 5.25
2. Add applets to the desktop
3. Suspend and resume from suspend
Applets don't display correctly
Applets are displayed as normal.
Linux/KDE Plasma: openSUSE Tumbleweed (64 Bit)
KDE Plasma Version: 5.25.1
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.2
Nvidia GTX 1080 GPU (Nvidia 515.48.07 drivers), X, not Wayland
This should be fixed in 5.26. Please reopen if not