If a player rotates in a single direction for a prolonged period of time, the precision of the "left" and "right" rotation decreases.
This can be caused by accidentally leaving a pen on a drawing tablet, causing the player to rapidly rotate in a single direction.
When placing down the pen on the tablet:
Rotating for about 15 seconds has no effect
Rotating about 20 seconds reduces the precision down to 0.5 of a degree
Rotating 30 seconds or over reduces the precision to over 90 degrees, and prevents the player from moving and breaking blocks in the direction the player is facing.
This effect goes away as soon as the player returns to the main menu.
I have marked this as low priority, because it is unlikely players will rotate their heads in a single direction for days on end without exiting the game.
Have a demo: https://youtu.be/6anUvzoQHw4
Thank you for your report!
However, this issue is Invalid.
Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.
Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.
Any plugin issues need to be addressed to the creator of the plugin or resource pack.
If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki