I am using Windows 10 and for me, setting text/layout scaling back down to 100% in the Windows display settings fixed the choppy reaction and slideshow-like rendering for me.

I found about this when trying GOG's article about jittery mouse reaction as a last resort (sroll to bottom):
https://support.gog.com/hc/en-us/articles/360000853854?product=gog

I hope that Piranha Bytes fixes that because text scaling exists for a reason and i have a 4k display...