Steps to reproduce
Trap an enderman in a boat.
Punch the enderman several times while it is in the boat.
Expected result
Each punch hurts the enderman.
Observed result
After one or a few punches you can no longer hit the enderman. If you use a repeating particle command to track it's position, you can see that it teleports away server-side (MCPE-31761) but remains in the boat visually.
After attacking an Enderman trapped on a boat several times, the attack has a certain probability of failure, and then you will not be able to attack the Enderman unless you destroy the boat, at which point the Enderman will immediately teleport.
Using hands to attack an Enderman full of blood will easily reproduce the problem.
Linked issues
is duplicated by 1
Attachments
Comments 8

Does MCPE-31761 describe your issues?
Does MCPE-31761 describe your issues?
After attacking an enderman in a boat it teleports away server-side but visually remains in the boat. The client-side position desyncs until you break the boat.
This issue should definitely receive increased attention. Today a player on Reddit has recently reproduced this causing them to lose their Hardcore world to an invisible Enderman. This issue also affects the latest hotflix and the 1.21.50.25 Preview.
Because Endermen can no longer teleport out of boats, as of the 1.21.60.27 Preview, I assume this can also be marked as fixed or cannot reproduce?