When you go into the nether, overworld, end, or if you are exploring new chunks the chunks don't load and when you go into the unloaded chunks you glich out and you have to restart the game in order to fix it.
Linked issues
duplicates 1
Comments 2

Thank you for your report!
We're tracking this issue in MC-227996, so this ticket is being resolved and linked as a duplicate.
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Duplicate ofย MC-227996, which was later resolved as invalid due to this issue being caused by optifine.