Using oh the biomes you'll go and biome's o plenty
Minecraft: 1.16.1
Forge: 32.0.88
seed: -7574297424947320682
Position: -2300 70 500
Biome: Great Lakes

Severe performance issues with increasing ms tick length which will crash server if not addressed or players leave the area.

Improved the ms from 87.02ms / 6tps and falling up to 13.8ms / 20tps
by using.

/fill ~-20 ~ ~-20 ~20 ~-5 ~20 gravel replace byg:mud_block

Appears something is wrong with byg: mud_block. Most of the benefit was reached by replacing mud exposed to water. That dropped it from about 87ms to 39ms.

Is there a way to disable this block temporarily until there is a fix?

Next release of our pack in a few days will try to get to 1.16.1 32.0.108 if all the mods are updated. Then hopefully 1.16.2 in about 20 days.

We're aware of this. Best you can do is disable the biome in the weight config for 1.16.1. We no longer support 1.16.1.