First, i have vanilla (no mods) 1.16.1 original minecraft, without a reason all guardians attack sprite, the charging beam stuff, gone missing, i can only see a bubble line pointing at me but no charging beam anymore, aparently that happened for the first time after i got a guardian in a boat with me. I tried restarting the game, changing graphics options, but it went gone for good. Down a .gif showing the bug in action.

https://ibb.co/wBdsrvp

I would prefer to upload the gif here but there`s that 10 mb limit...

EDIT: I decided to go more investigative and i did some tests to see if the bug is something to the world or if it is something to my machine.

1st test: I created a new world in creative just to check if the sprite is missing in this world too, but it is not missing in other world, PC 0 x World 1
2nd test: Then i decided to log in another computer ( My wife`s computer ) by LAN to check if the sprite is missing there too, and it is! so PC 0 x World 2

I believe that any minecraft 1.16.1 vanilla should experience the same issue in my world, that`s why i`am uploading my world ( Plethora ) to google drive so you guys or in the future the devs can investigate the bug.

( World folder ) https://drive.google.com/file/d/1jbcYQ1ZMgm7CKkOahz3N6LCdALurb2nl/view?usp=sharing
( Bug in action .mp4 version ) https://drive.google.com/file/d/1J3tGiOfD4oO55Z6VxRRp7D5ZPqnAKTXW/view?usp=sharing