Ui freezing seemingly at random but the game still runs

I'm not sure what triggers this as there doesn't seem to be any. However, at random, whether in a chest, inventory, or crafting table, the Ui will freeze. When the Ui freezes the games still runs. You can move around hear the game sounds and interacting with things. The Ui will just stay frozen on the screen even if you reopen your inventory or something. You’d be able to interact with the items and use it though whatever Ui it froze on doesn't change. This only occurs in realms, and I've done a lot of things to attempt to fix it encase it was on my end. It’s more than likely not on my end unless I somehow am missing something. It seems to be freezing more as time goes on. So it can happen right when I log on or multiple minutes after logging on. There also is a thing where the numbers in the Ui will blink or glitch. It seems like it's changing between a bunch of different number happening fast enough to just look like a blinking. The items in the Ui with also blink though the blinking with both the numbers and items occurs once before moving to another. There doesn't appear to be a pattern only happening at random. To be more specific when the items and numbers blink, I've only ever had it happen sometime before the Ui freezes. However it doesn't occur every time. This also started occurring not to long after updating the realm to 1.21.5 and never happened before hand.

Edit: Apparently it does happen in single player. I kept playing in it and after a few hours of playing throughout multiple days. It began to occur in single player as well.