2021.2 and Unbreakable Blocks

 I just updated my mod from 2012.1 to the latest. Any blocks that are checked as "is unbreakable" will not spawn in structure gen after I updated. So I went back and un-checked the box marked unbreakable in my 2012.1 version and saved it. Loaded it back up in 2012.2 and they still would not spawn. So far that is the only thing I can not figure out but I am working on it. I will have more time in the next couple days to figure it out. 

On the flip side my mod got about a 10fps bump from the update which is outstanding and my structures are loading in faster.

Chew