OK.
Starting the session in fullscreen and then switching to a windowed mode works and keyboard is grabbed correctly, i.e. the keyboard shortcuts go to remote session only when the window is active.
So I don’t honestly understand why you do not allow keyboard grab in windowed mode if it works this good @martin
Is there a way how to enforce the resolution of the opened session, i.e. set it to 1920x1080? I have 49" screen on my desktop, so I want to have the session opened only on part of my screen.
Edit: Unfortunately it seems I tested it wrong. Or it did stop working after a while, but keyboard shortcuts are not working after switching to windowed mode and even switching back to fullscreen won’t make it working again😭 So it is basically not usable for general use outside of staying in the fullscreen whole time.