if you dig a bed in survival from the top side you will not get it but if you dig the bed from the short side you will get two beds.
(Phone : Samsung Galaxy A5)
MCPE-17203
A bug in the bed
Resolved
Fixed
0
(Unassigned)
Unconfirmed
Phone - Android - Samsung Other (Specify in description)
Android 5.0.1
0.15.90.0, 0.15.90.1, 0.15.90.2, 0.15.90.7
Future Release
Retrieved
Confirmed on Nexus 5 Android 6.0.1
Beta Text Line1: v0.15.90 alpha build 1 GuiScale-5
Beta Text Line2: LGE Nexus 5, Adreno (TM) 330, Android 6.0.1
Also, a side effect of the bed duplication is that if you place the duplicated bed, it will break when you try to pop it instead of dropping a bed (see MCPE-17140).