Non-aggravated endermen never teleport when not in sunlight, also causing some to never despawn if stuck

Endermen never teleport when they are in the dark, so if one is stuck on a ledge or in a hole holding a block they never despawn unless a player interacts with them.

They can sometimes place the block inside themselves (MC-259572) but even then it doesn't matter because they immediately pick it up again

Not the same as MC-191725 but related to it.