Originally posted by Rybak:

and neither with a BespinX mod nor a InslimmV mod. ( as you can see on my recorded video which i recorded 5 min ago )
https://www.youtube.com/watch?v=KYVmA8M1cpo

this is actually interesting, never found a ground like this
what does the log say when you hit it? Maybe it says something NULL minerock or null/empty/missing something else
what's the seed and position :V? I wonder If I can reproduce it :D (server has mods enabled and running too? does it happen on single too?)
Currently it looks like this ground isn't considered "ground"

Maybe it's the same thing as indestructible trees?
*if it really is the same then the more reason to try modding it*

Originally posted by Rybak:

Here I welcome you to come to my server and fix this issue which i wasnt able to fix by any game means.

what's the IP/password?
once family share becomes free I can try