Is anyone seeing weird behavior in Springshare products? (Right now, I'm only seeing it in LibGuides, but I don't know how tightly their systems are integrated.)
Things that have happened to us:
1) Two "published" guides (that I know of) showing up in public widget lists and in the backend, but if you click to edit them they give a 404. If you try to visit their address, either by friendly URL or guide ID, you get a 404. But again: they show up in lists, which they would not if they'd been deleted.
2) Updating the URL pointed to by a redirect results in a "success!" message, but the address does not actually update in the system. (Changing the name of the redirect is successful, though. And creating new redirects is also successful. So that was my workaround.)
3) It's impossible to remove the last "Expert" from a subject. (We don't have subject experts, so how they got assigned in the first place is a mystery. I'm prepared to assume it was an error on our side.)

Out of all these issues, obviously the only really bad one is the one with no workaround: some guides are simultaneously there and not there.

I was 90+% sure they hadn't been deleted, but the first step Springshare Support asked me to take was to look for them in the Guide Backup area, where deleted guides show up. They were not there.

They also had me look (again — I'd sent them a screenshot, which they acknowledged, it's cool) at my redirects list. Which wouldn't affect the "edit" view.