The bug

Endermen don't pick up respectively place complete multi-block blocks (e.g. doors, beds, double plants). Instead they only pick up one part (making the other parts break and potentially drop as item) and only place the part they are holding.

However, accoding to the following comment they should pick up the complete multi-block block (i.e. all parts) without making any of its parts drop an item, and respectively place the complete multi-block block again.

The bug here is that only half the bed gets placed when the enderman places it down.

Source

Considerations

• Endermen should make sure that there is enough space when placing blocks to not overwrite existing ones
• The current NBT of endermen does not support multi-block blocks. If the NBT is changed it would be useful to still support blocks which do not exist in item-form (e.g. water, lava, portals, fire, ...).

Reproduction steps

1. Summon multiple endermen holding beds

   /summon minecraft:enderman ~ ~ ~ {carriedBlockState:{Name:"red_bed",Properties:{part:head}}}
   

   /summon minecraft:enderman ~ ~ ~ {carriedBlockState:{Name:"red_bed",Properties:{part:foot}}}
   

2. Wait until one of the endermen places a bed
   Only the respective part of the bed is placed