When an armorstand is summoned with a villager as a passenger, the villager's rotation will be wrong. This is clearly visible in the following GIF:
https://gfycat.com/UnevenUnfoldedAmericanratsnake
MC-99363
Villagers riding an armor stand do not handle rotation correctly
Resolved
Duplicate
0
MrGarretto
(Unassigned)
Unconfirmed
Minecraft 1.9, Minecraft 1.9.1 Pre-Release 1
Retrieved
Sounds like MC-69613, right?