- The issue I mentioned at posts:
viewtopic.php?f=77&t=53476&start=120#p537346
viewtopic.php?f=77&t=53476&start=130#p537579
and also heard from some users are solved after I noticed that light-locker was not installed by default and on MXPI installed from Stable Repo, tried all, lock screen, suspend with default way (xfce4-session-...) All OK.
- And an interesting clue again related to the "shade" issue on panel: posting.php?mode=reply&f=77&t=53476#pr538487
After suspend & wake up it disappears (till next boot).