The Wither re-does it's "spawning" animation when you relog, and lose it's Wither shield

When you relog, the Wither will “re-do” it’s spawning animation. It will turn white and spin around faster and faster for a couple seconds, then will return to normal. If the Wither is below half health when you do this, it will initially have it’s Wither shield, but will lose it upon finishing it’s spawning animation.

How to replicate:

-Spawn a Wither, and wait for it to finish spawning and start harassing nearby mobs

-Save and exit your world, then rejoin

Expected results:

The Wither will skip its spawning animation, as it’s obviously already spawned.

Actual Results:

The Wither will re-do it’s spawning animation.