Describe the bug
Killing Aurostor is not being recognized, only on /reload or relog. So if I kill the boss and log out, it will not be remembered.

Do you have an error log of what happened?
There is no error.

To Reproduce

1. Kill Aurostor
2. Note that the box stays empty
3. Log out and in on another character
4. Note that the box is still empty. The checkmark only appears after logging on that character again or doing a /reload.

Which version of SavedInstances are you using?
10.2.1

Was it working in a previous version? If yes, which was the last good one?
N/A (last version was released before the boss was live)

Cannot reproduce.

I'm out of unsaved chars but will repro next week, what do I look for or are there any debug printouts / logs I can gather?

You can enable SavedInstances' debug mode. And you can provide WTF file of SI after your kill and log out.

Also try /run print(C_QuestLog.IsQuestFlaggedCompleted(76367)).

Thanks, will do all that and report back after reset.

Well, this went from 100% reproducible to never happens, so I guess it must have been a bug that they fixed sometime last week.