When summoning a Wither with NoAI set to 1, his bossbar will never change and stay full.
MC-147943
Wither bossbar don't update if NoAI:1
Resolved
Duplicate
0
Siandfrance
(Unassigned)
Unconfirmed
Minecraft 1.14 Pre-Release 1
Retrieved
This is Working As Intended, see MC-84243.