For quite some time I'm trying to find and answer if there are any new information on "Mystery items found" bug bothering all beta testers. It's quite annoying to watch this not moving anywhere after such a long time.
I believe @HPWUrobert was the last person I saw address this issue. I think he tried to test out a couple of solutions, but not sure if any worked.
We haven't found a solution that works for everyone, but I'll raise the issue again with the team.