Cave Vines can be cut off by Mineshafts

This happened in the same area I shown in MC-242655 but probably isn't the same issue, in the picture below this post, the 2 Cave Vine blocks shown are cave_vines_plant blocks (just cave_vines are meant to be at the bottom of a whole vine), they should have more attached below but were cut off by the Mineshaft here.
Seed in picture: -347828615443259447