After running Bandicam and proceeding to play a game, I received a steam message. I could not see the message pop-up, and the reminder of Shift+Tab overlay toggle did not appear. I tried pressing Shift+Tab, and it did not toggle the overlay. I set the toggle binding to various other keystrokes, but it still didn't work.

When I do not run Bandicam, I'm able to toggle Steam overlay and see pop-ups.

Any solution whatsoever?

Please, try this workaround: viewtopic.php?f=10&t=3567#p12388

Hello!

If you start Bandicam before the steam game, it can happen.
We don't have a good solution for this issue.

Please start the game first, and then start Bandicam in 20~30 seconds.
It will minimize the hooking issue with the Steam overlay.