This cropped up about two updates ago. I have Join set to mirror my emails that arrive using Google Inbox. Inbox is still set as a forwarded app, and my Chrome desktop is still selected as a forwarded device. For some reason, emails are not forwarded. Other apps forward their notifications just fine (SMS, Steam), but emails simply do not appear. All diagnostics pass on both the device and the Chrome desktop, and I've changed nothing on my end. I'm unsure what the issue is.