Noticed this issue a few months back, didn’t think much of it cause it was just letters not rendering properly like a corrupted looking s or h at first, but now after the 1.21.6 there’s a whole array of rendering issues: 1) hotbar, inventory and armor not rendering (invisible but still use-able). 2) All items, crafting menu, esc (settings) menu, and even the main menu changing color to a random neon color. 3) Hotbar ui, crosshair and all setting options being invisible so you can’t even quit the game (forcing me to restart my pc). All of these issues are so random and happen anywhere from 1 min into joining the realm to 10 mins in.
I’m probably missing some other things but these are the most prevalent that I’ve experienced. (As the bug report says this impacts mostly intel integrated graphics which is my case as well).
It’s probably the resource pack, I’ve tried 1.21.7 without any packs and still have the same issues.