There is a quite annoying issue with the action cam. If your cursor is hovering over something that causes a popup (map, party player picture etc.) that popup will stay up until you unlock the cursor and move it away. I find that I have to do that quite often. It also affects overlays like Overwolf, in which case clicking causes the focus to be lost to Overwolf and whatever controls are pushed down at the same to stick. I think this issue could be resolved by moving the cursor to the center of the screen when action cam is enabled.