Idk how this happens but some times when partially in a block and u place a block in the space that u r partially in it disappears from ur inventory and world. (this is extremely annoying with shulker boxes in which i lost all of my good items) ); pls fix as soon as possible:
MCPE-22989
dissapearing block glitch
Resolved
Duplicate
0
Ethan Beran
(Unassigned)
Unconfirmed
Windows
block, inventory
1.1.1.51, 1.1.2.50
Retrieved
Thank you for your report. This issue was, however, submitted earlier as MCPE-22065. Please perform a search next time to make sure your bug hasn't already been reported.