First of all: wut? This new GPU based physics, or optimisation, or whatever is pretty weird... Note that it's triggered by *any* overlay, not just the in-game ones. Shown: Steam and my keyboard's "Scroll Lock" notifier (key I use to start/stop recordings). I couldn't find any similar blocks that did this too. And these only did it in this orientation. Save and (oversized) ouputlog attached.