When you place: it changed is air block
When you dig: It is frozen block
This bug can control blocks
MCPE-8267
Air block + Frozen block
Resolved
Duplicate
0
(Unassigned)
Unconfirmed
Tablet - iOS - iPad Mini
8.0, 8.1 and 8.3
air
0.10.4
Retrieved
If you did not already, please remember to perform a search before creating a ticket to see if your bug hasn't already been reported.
This issue was reported previously as MCPE-7844; comment your experience there!