Not sure if this is in any way at all your fault, just thought I would post it here too so you guys are aware of it.

To be clear this only happens when DIstant horizons inbuilt generator is used, so it is probably their fault (?).

Why are you reporting it to us then

I figured it may be caused by the way you do these features/terrain, since I haven't seen this issue with other mods features.

maybe, @CorgiTaco Could you take a look at this?

Going to close this as from what the team can tell it's on the Distant Horizons side