When I maximize window, it is behind the panel. I have set panel to be always on top and never hide. Yet, maximized windows are behind it. It is rather annoying as I have to resize windows manually to fit or have part of the window hidden. See screenshot in attachment. Reproducible: Always
Created attachment 95944 [details] screenshot
please post the output of "xrandr -q" and "xprop" (for the latter click the panel after the cursor turned into a '+')
Something like this happens for me also, but: a) only with second display attached, and b) for the vertical panel on the edge connecting displays. There is a similar bug filled (323230) but for much older version (4.11?) This happens with kwin and kscreen from 5.5.3.
Created attachment 96735 [details] output of panels xprop
Created attachment 96736 [details] output of xrandr -q
*** This bug has been marked as a duplicate of bug 94470 ***