shortcuts 4 file menu don't work

Hello all !

sorry to send this, but i didn't find anything on the web even on 
google.

It is about idle-python 3.8 and 3.9 on kubuntu (ubuntu + plasma kde) 20:

1) about, shortcuts for open, close files etc.. do not work (CNTR+X or 
CNTR+S ... +O and so on)

2) with  the mouse, ok, i can do the commands, but the file's names 
won't immediately appear (must "onmouseover" the square icons in the 
menu to let appears the name's files.)

bye for now!

bruno