When a dying mob fall over and hits the ground, it continues to slide along it rather than stopping in place. The direction is usually similar to that which was active before contacting the ground, but not always identical. The effect appears to be dependent on the mob.
See the attached video.
Linked issues
is duplicated by 4
relates to 8
MCPE-49418
Phantoms do not drop their exp in the place where they die
Resolved
MCPE-166394
Slime and Magma Cube can still attack player during death animation
Resolved
MCPE-68327
Other zombified piglins aggro when you one-hit kill one of them
Resolved
MCPE-162048
Mob collision boxes still function when mobs are dead
Resolved
MCPE-19544
Endermen can teleport away during death animation
Reopened
Attachments
Comments 19
This bug is quite old, apparently stemming from the fix in MCPE-19222 . This bug prevented mobs from experiencing knockback upon death, and when it was specifically fixed in beta version 1.7.0.2, another bug appeared in MCPE-9999 , which was fixed in beta version 1.13.0.9. It seems all these problems originated from MCPE-19222, as it had apparently been occurring for years according to the community, and no changes had been made to the code since then. However, the latest bug remains: mobs still move during their death animation. This problem is more pronounced with fast mobs. It should be fixed, as it negatively impacts the game's visuals.
This looks fixed to me in 1.14