Just letting you know that this is still valid bug.
I hit this bug after upgrading to Fedora 25. I logged in Wayland GNOME session (I was a user of X GNOME), and I can no longer fully control a remote desktop via VNC, using the Remmina VNC client: alt-tab, windows key etc shortcuts are all captured by the local desktop, even when I've set the remote one to full screen with full keyboard grab. This makes work very painful, so I'll have to revert back to the non-default X GNOME session.
Regarding the "security feature" argument that I've heard, I don't see it, as long as I give permission for keyboard grab by explicitly selecting it and possibly answering some dialog box. Apparently I wouldn't like random applications listening to all my keyboard events, but this is not the case here.
Just letting you know that this is still valid bug.
I hit this bug after upgrading to Fedora 25. I logged in Wayland GNOME session (I was a user of X GNOME), and I can no longer fully control a remote desktop via VNC, using the Remmina VNC client: alt-tab, windows key etc shortcuts are all captured by the local desktop, even when I've set the remote one to full screen with full keyboard grab. This makes work very painful, so I'll have to revert back to the non-default X GNOME session.
Regarding the "security feature" argument that I've heard, I don't see it, as long as I give permission for keyboard grab by explicitly selecting it and possibly answering some dialog box. Apparently I wouldn't like random applications listening to all my keyboard events, but this is not the case here.