If Forlorn Hollows generate closed to land, there are chance that chain which usually connect to block above will connect to far high sky!

Neo Forge 47.7.106
Mods Installed:
alexscaves-1.1.5
citadel-2.6.0-1.20.1
(No other mods installed)
Seed: -5692536063308480476
Location: 6270 -23 1417

Noted: If you generate world with this seed and use /tp to extact 6270 -23 1417 it will not happen

If you come from other chunk (test by teleport to nearby then walk to it) and let them generate it will found this

Difference:

Teleport to extact 6270 -23 1417

Walk from other chuck (teleport to nearby then walk to it)

(you see chain on left one will appear and cause it)