To get this bug you need to interact with blocks that have their own GUI or wait a while.
When the bug happens items in the GUI will be visually corrupted, being displayed in one color, or visually destroyed by lines, dots etc.
It can also prevent all GUIs from being displayed.
It looks like the player has pressed f1, but the item the player is holding is still displayed
After exiting the game and entering again the bug seems to disappear, but it probably comes back after some time.
A rare bug may display strange lines on the screen while walking, which disappear immediately after being displayed.
Thank you for your report!
We're tracking this issue in https://report.bugs.mojang.com/servicedesk/customer/portal/2/MC-296908 , so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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