Issue:

When you put a map at a glowing item frame the player position (not positions) gets rendered as 2 positions.

Recreation:

Create a map, put it on a glowing item frame, and it appears to be that there are 2 people (even in singleplayer!)

Link to drive link for proof:

https://drive.google.com/file/d/1Zxaad-mRHq4wnDHzoNw5UI6KH8oZIO8x/view?usp=sharing