Issues with Oreo and dex. Mouse capture

[s4shield]

I have an issue where dex captures the mouse and no matter what key combo I press it won't let go. It also won't take and inputs from my keyboard at all. This can be recreated by playing an hdr video on the youtube with an hdr tv. It jumps into full scree, plays the video, but locks up the phone until I pull it from the dock. Similar thing happens with moonlight gamestream but I can use a keyboard combo to unlock the mouse at least.