So frustrating, cool plays happen, spreadsheet on 3rd monitor recorded. help!
Bit of a muck-around, but this worked for me:
1) Open AMD Settiongs app and disable desktop recording
2) Drag app onto your preferred desktop
3) Click on another app on preferred desktop (ie: your game)
4) Alt+Tab to bring up AMD app again and enable desktop recording
Might take a couple of goes, but it's the only thing that's consistently worked for me!