I've just tried it on a another PC and similar anomalies are occurring.
"panel glitch_left" shows the condition immediately after starting XXHE (or coming back from unattended) .
"panel glitch_right" shows the condition following a minimise command.
Note the characteristic of the vertical resize bars has changed, which might be a clue.
Even clicking on the "set panel to font size" button made no difference.
re. #1 , it's not a biggie, but would look nicer that's all. Perhaps you could fudge things a little by putting a transparent border around the whole GUI so that when you maximise it you can still see everything.
O/T P.S. .... I think some omnipotent being recently swapped Alonso's and Webber's brains