Hello,
Just to tell you the 2 bugs (with GIF) from the first post are fixed in the next patch.
We also fixed some crashes related to glue groups (when deleting them) and some crashes related to "seed building". (can't promise it fixes all the occurences you found, but that should improve stability).
Also, the quick save should be working (Ctrl + S), anyone had this problem also?
Cheers,