Interesting! I will try to replicate the problem after my shift tonight and fix the issue.
The backfilled stope bug has been solved, so I'll release a small patch with those two fixes tonight!
The bolting as well as the backfill bugs have been fixed! As well as many other small bugs (hopefully I didn't introduce new ones!)
As soon as I'm back home from my FIFO schedule (1 week left) I'll start working on a Saving feature. This is a must indeed.
Oh and I've started working on a Discord channel, it will be launched tomorrow :)