When you are riding on a boat, minecart or pig (does not affect horses) and try to open a chest it opens but the inventory does not open. The chest will close only if the world is closed and reopened.
MCPE-16529
Chest UI is not accessible when mounted on a pig, boat or minecart.
Resolved
Fixed
0
(Unassigned)
Confirmed
Windows
Windows 10 version 1607 build 14393.51
0.15.6
0.15.90.0
Retrieved
Fixed in 0.16.0 build 1