I can't speak for everyone with this issue, but I downloaded the Tribble client earlier in an attempt to narrow this down, and it appeared to fix the issue for me completely (running DX11). I kept hovering over a few of the Gamepref file lines to see if there was anything relevant changed there, but even after completely…
(This post is basically a copy/paste of what I submitted on r/sto a short while ago, but I wanted to post this here as well) I've just returned to STO last week after a few months off (I haven't played regularly since the end of DR), and I am now without the capacity to play the game entirely since yesterday's (Aug. 6th)…