I've load a game that has been created with Rocketry Upgrade (cycle 550) with this Space Industry version : 289453 and I have a lot of regolith columns that spawn everywhere on the surface. Also, it adds me regolith on some zone that I've already mined.
(See red point on the first screen shot, on the second there was nothing on the floor)
Steps to Reproduce
Load a game from Rocketry Upgrade with the last patch.
This issue has not been confirmed by a developer yet.