I do not have all of the older versions of software for these units, but there is a warning now posted on the S/W release notes that was NOT previously posted.
I printed to PDF when I downloaded the updates = and this warning was NOT shown - so I would recommend to flash back (at you own risk), and reinstall v 1.83/1.84 as per the warning....
G'Luck, LMK if I can help~
RAS