[BUG] Music not playing for boss mobs in 1.16.5 (this also includes modded mobs)

[Dracotyoshi]

mob.enderdragon=BrokenHeartofEnder
mob.wither=wither
that's the code I used to play the boss music for these mobs but It just continues the default music for set biome
also I have checked the music file multiple times
this has to be one of the biggest bugs in this mod like ever
The same applies to modded mobs
and conflicts tend to happen
when two mobs share a name like fire dragon from fire and ice,& fire dragon dragon mounts legacy.
I don't want to hop on my fire dragon and hear boss music now!
It would be great If there could be a patch that changes this code
change it to be typed like this
minecraft:mob.enderdragon=BrokenHeartofEnder
minecraft:mob.wither=wither
just to remove conflicts
and one more thing
alow us to edit how many monsters counts as a horde