When you look at an Enderman in the eyes it will teleport away and start playing an enderman noise thing. If the Enderman is killed very quickly or teleports away, the sound is still playing even though the Enderman is dead which makes no sence.
The sound should stop playing after it despawns or gets killed.
Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of MC-94956, which has been marked as Won't Fix - while this behaviour is not desirable, the developers have said that they will not or cannot fix it.
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