In the End, endermen are spawning regardless of light level, and they are spawning on top of stained glass blocks. I've tested this by completely covering everything in the End (the main island where the dragon spawns) with water - after the dragon is dead. Endermen will still spawn on stained glass blocks that I place down, regardless of how well lit the area is. They are also spawning on top of the bedrock (fountain and blocks on top of the obsidian pillars) if I don't cover their surface with bottom-placed slabs or water.
Linked issues
duplicates 1
Comments 16
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-14467.
It has been linked to this report.
Please search before reporting, as it's likely that one exists already.
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Side Note
The mentioned enderman spawning in lit area has been documented/reported as a separate issue: MCPE-28627
Are you sure there isn't a cave where the enderman spawn and then teleport to those blocks? Enderman teleporting has different rules then spawning. I don't see this issue if every possible spawn is blocked in version 1.2.5.