null biome in custom world useing normal biome

i just added the data pack for the biomes

it seems to do it randomly so if first time try over and over

21w14a
Also sometimes creates lag when crossing chunk borders.
Happens more consistently after /kill if having flown away from spawn or when in nether or end, almost never just right after having created world.
Reloging sometimes fixes, sometimes not, sometimes only fixes chunk you are in and crossing chunk border brings it back.
Altered biome featuers seems to work as intended, and ive changed a few things independantly.
One time every biome showed as ocean rather than null.

Probably caused by MC-197616

happens to latest 21w15a snapshot with world gen datapack.  Severe lag and null biomes.

Yeah, this is a duplicate of MC-197616