21w06a Fossil Generating Bug

The newest snapshot has a bug where the bone structures that spawn underground spawned floating in one of the caves, and I'm not sure if this is a one time thing or if this could happen more often.  It is just floating in the air though connected to nothing in one of the caves.  Not a super big problem at all, but still a bug I thought I should've reported and I don't see this problem in other posts.