When you place an armor stand on the same block as an open trap door, then leave and rejoin your world, the armor stand will automatically assume the same pose as it would when powered with a signal strength of 15. This happens regardless of whether the armor stand is standing on a solid or transparent block.
MCPE-190983
Armor stands in the same space as open trapdoors assume a specific pose upon reloading world/chunks
Open
4
Can confirm.
Steps to reproduce:
Place a trapdoor and open it.
Run the command /summon armor_stand while standing on the same block.
Save and quit, then rejoin the world.
Observed results:
The armor stand will have assumed a different pose.
Expected results:
It should remain in the same position as it was last left in before you quit.