The bug:
The warden can get pushed around when emerging and digging.
Steps to reproduce:
Activate some sculk shriekers
Once warden starts emerging, try pushing it around by running into its hitbox.
kill the warden with /kill @e[type=warden]
Summon a new warden that will start digging right away
/summon minecraft:warden ~ ~ ~ {Health:1b} (The Warden currently digs down right away if assigned any nbt data as can be seen in MC-249393)
Try pushing it around by running into its hitbox while it is digging.
Observed results:
The Warden can be pushed around when emerging and digging.
Expected result:
The Warden won't have any collision until it's fully emerged or once it has started digging.
can confirm