Namely, the HUD, UI, and sprite graphics will all look glitchy (as if some pixels are misaligned). This will also cause instability wherein my game will become unresponsive and subsequently crash if I alt tab for longer than a couple of seconds.
I recently updated my GPU drivers (nvidia recently put out a substantial update), however I'm not sure if this is relevant or not as I can't recall if I had vsync enabled before the driver update.
Spoiler: HUD & Sprite graphics, and UI graphics respectivelyThis is on Windows 10, RTX 3060TI, GZDoom version 4.14.0a, Vulkan rendering. Tested on Doom 2 with no additional mods/wads and with a fresh config file (I disabled texture filtering, otherwise the graphical issues don't appear)