New Mail issue this morning ...
Same accounts in Mail on my 12 PM and IPP 11
12 PM shows badge for 21 - IPP 11 shows badge for 71
Manual refresh of both devices
12 PM shows badge for 65 - IPP 11 shows badge for 71
12 PM in Mail accounts add up to 65
IPP 11 in Mail accounts add up to 71
Turns out the IPP had 6 emails in a Gmail account showing as Unread that had been deleted earlier on my 12 PM.
Seems like the IPP 11 is updating the badge correctly based on the Mail internal count. The 12 PM is not showing this same accuracy. Settings are the same.
Reported via feedback