When a ghast has no AI ({NoAI:1}), the player can still push it, causing it moves a short distance.
MC-152700
You can push a ghast when it has no AI
Resolved
Duplicate
0
Republican
(Unassigned)
Unconfirmed
(Unassigned)
Minecraft 1.14.2 Pre-Release 3
Retrieved
This issue is a duplicate of MC-65664, which is currently considered intentional (see the last comment on that report).