2.2 doesnt handle upgrade yet if running unbound on 2.1.5
pfsense 2.4 super micro A1SRM-2558F
C2558 8gig ECC 60gig SSD
tripple Wan dual pppoe
true .. and did not have the update packages.
I opened a ticket - https://redmine.pfsense.org/issues/3880 - and will work on it
Upgrade code is now pushed to 2.2 and will be available on next round of snapshots.