As you can see sometimes when a piston break a speleotheme, upside of the speleotheme is keeping, but by the time it change in to a normal small speleotheme and grow aparently normal.
MC-230846
Some times upside of speleothemes keep when piston work
Resolved
Awaiting Response
0
I can't seem to reproduce this issue in 1.17.1. Please provide some additional screenshots or videos of this problem occurring whilst the F3 debug screen is enabled.