Mobs will become invulnerable when applied with invisibility effect and die when the potion effect time ran out (after being hit multiple times). It can't be killed even by using commands. It will make sideways animation when the mob die (but not actually die).
MCPE-19103
Mobs become invulnerable when applied with invisibility potion
Resolved
Fixed
3
(Unassigned)
51750
Confirmed
Android
entity, invisibility, mob
1.0.0.2, 1.0.0.7, 1.0.0
1.0.2
Retrieved
Reopening as it does in fact differ slightly to MCPE-19041