What happened?

Sometimes biome structures can appear on water surfaces (lakes), probably they are missing terrain check

BetterEnd

2.0.2

BCLib

2.0.5

Fabric API

0.56.0

Fabric Loader

0.14.8

Minecraft

1.19

Relevant log output

None

Other Mods

better-nether-7.0.2
iris-mc1.19-1.2.5
sodium-fabric-mc1.19-0.4.2+build.16

Should be fixed in 2.0.5