Very specific bug this but as Bridge sits at the centre of my workflow it affects every file I open!

Steps to reproduce:
1) Open InDesign
2) Open a file from Bridge - right click, open or double click (keyboard shortcuts work fine the first time!)
3) Close file in InDesign
4) Open a file from Bridge as above

Now most keyboard shortcuts - eg. Place: ctrl-D - won't work. Holding space gives you the temporary hand tool but that's about it. You have to hit alt-tab twice to get back to normal shortcuts working.

If you open another file in the same way, shortcuts seem to work again.

If you open from File Explorer they work as expected.

If you open from the recent files thumbnails inside InDesign they seem to work fine.

If you drag from Bridge, focus seems to stay on Bridge - keyboard shortcuts affect it instead. But that doesn't seem to be what's happening with the open command here... the shortcuts just seem to disappear into the ether!

System:
+ Windows 10 Pro 64-bit 22H2 / Ryzen 9700x / 64GB / RTX 4800 Super / 990 Pro / Wacom PTH-851 - latest drivers/firmware for everything.
+ InDesign 20.1 but it's long standing behaviour - been like this through as many point releases / versions of Windows 10 as I can remember.