Rails in mineshafts can sometimes generate on air/cobwebs

Rails in mineshafts can sometimes generate on air or on cobwebs, even through rails can't be supported by these two blocks. Updating those rails will break them.

 

Seed: -100817776063774199

Location: /execute in minecraft:overworld run tp @s -81.18 -19.95 554.05 -26.85 5.85