@Barhandar
I think I've found the bug: https://u.smutty.horse/mbmbizqogiq.png
You were correct that it was an issue with the tag transformer. Since tags on the front or the end of the list are handled separately, they would not be affected by this. Should be fixed now.

Nice detective work. I guess I'll have to be on the lookout for any other images that might have been affected. Fortunately should only have affected images from Twibooru (since they're the only ones that use the tag) that were imported via the scraper (So not the big import I did the other day).

@porter
>editor:edits of hate,unofficial characters only,editor:unofficial edits thread
This image has correct "oc only" tag, it's not aliased, and unlike most other imports, it was this way on upload instead of being changed afterwards. The importer code probably ended up stripping out both commas instead of just one of them.

The real question is why >>6184378 hadn't had any accidentally merged tags, even though it's in similar situation. Was "unofficial characters only" the first or the last tag in the relevant string on it?

@Barhandar
Well, it definitely happened but I can't seem to replicate. I checked the output of the scraper for this image from Twibooru and it seems fine. See a copy here: https://pastebin.com/c43fRM8F. Both editor tags are separate. As you said, they had never been merged on Twibooru so it can't be that. Looking around at some other imports with dual editors (also from Twibooru) they seem to have imported properly. So I guess just keep an eye out for if it happens again.

Hey, porter, you seem to have a bug in your import software — two "editor" tags got merged together here, while they're separate on the twibooru upload and have always been.