Linux: CQUI Trade Screen overlay randomly can't be dismissed

[corq]

Randomly CQUI trade screen will not dismiss after considering (but not completing) a deal. i.e. I cannot escape the deal screen. This seems to happen if I bring up the trade screen while a turn is completing in the background and the game itself shift the ui in the background. Notably, if I can reach ui elements on the side of the screen they are clickable, but remain obscured behind the CQUI deal screen.

Interestingly at one point this happened and another civ prompted for a deal, and the "original" deal screen was partially visible underneath. At this point, clicking escape dismissed both deal overlays with it, and I was back to the game again. If there is a specific log needed, I can upload. Ubuntu 16.04 Mate.

[corq]

Another example with cqui trade over top of tech tree: