This issue gets worse for me with every update it seems- and it seems to progress as I open menus like chests and inventory. It starts as a text glitch, then the black text and blocks like in some of the images, and then my HUD disappears altogether including my pause menu, and I have to restart my game once that happens. I hope this gets figured out soon! I’m building a storage room rn and it’s making me have to close the game a lot, lol. Such an odd issue.
The black text and disappearing HUD/pause menu disappearing is also a new development with 1.21.6. In 1.21.5, it was only that text would get more and more glitched, as well as pixels in some items such as shulker boxes getting corrupted.