Try updating to the latest commit c576847c5841b706d1c7054cc42f55025bd0a2af and see if this issue persists.
This was a suspicion I had–because I introduced a bug recently (that I didn’t think would have this effect)…
I added the “save-all” frequency to the webui, which sent the command saveall to the console. Of course, the correct command is save-all, so it was a typo. Despite that, the game … shouldn’t crash because it receives saveall–it would be literally like if you typed it into the console and then everything died (it should handle it more gracefully).
however, if you went back to the commit I told you earlier:
this previous commit I had you roll back to–didn’t have this functionality at all (and thus didn’t have the bug). Rolling back to the previous commit should have solved this issue (if going to the most recent commit, in fact, fixes anything).
But at least we have something to work with. Update to the most recent commit and try setting the value to (which disables this) and see if your servers stay up.