The damage of the wither boss skull shell is unstable (no projectile damage on direct hits)

Wither's projectile damage is unstable, sometimes it only damages one heart

repeat process

Summons a command block and turns it into purple and awaye-activates

and type /effect @e clear

observation results

Damage Wither has a glitch, sometimes it only comes in 1 damage (1 heart)

expected results

The wither projectile damage should deal the correct damage (4heart)  8 damage 

This issue is about MCPE-152907

MCPE-153299