Physical space bar issue in video apps

Hi,

I am experiencing some issues with SwiftKey beta on Android O beta. Both are up to date but the issue isn't new.

When I am playing a video either on MX Player, VLC or YouTube, I use the space bar of my Pixel C's physical keyboard to pause it. It does work. However, even after resuming the video (again using the space bar), the status bar and the navigation bar stay visible. On the navigation bar, the back button is turned to the bottom, meaning it detects an active keyboard.
If I press the back button, both bar disappear.

I have tried other keyboards (Godard and SwiftKey stable) and the issue isn't present in those case. The issue might have started when I upgraded to Android O beta but I'm not quite sure.

Could you please fix this issue? It is quite annoying because I watch videos every day on this device and always use the space bar as a pause/resume button. 

Thanks a lot.

Kind regards,
Antoine Purnelle