You can hear the teleportation sound and see the particles but you can't actually see it teleporting.
Steps to Reproduce
Get an enderman into a minecart
shoot it a few times with a projectile
move away and wait
Note: teleportation during shooting the projectile is MC-183446
Related issues
Comments
Duplicate of MC-183446 or not?
Confirmed. Throwing snowballs at endermen in minecarts creates excessive sounds and particles. This also happens for boats.

@unknown it's not? it happens after you stop shooting projectiles

@unknown no, what you confirmed is MC-183446. this bug doesn't seem to happen on boats tho
Hi there!
I can confirm for 1.16.2pr1 (I didn't test in 1.16.1).