iDRAC web interface not completely drawing after 2.70.70.70 update

I just took an R530 from a very old DRAC 8 firmware to almost the latest; that was fun by the way having to step through various versions since some were too great a jump to allow.  Anyway, I think I went successfully from:

2.30 to 2.40 to 2.61.60.60 to 2.63.60.61

All was well.  I had a second matching system i was doing at the same time, all good there too.

I upgrade to 2.70.70.70 and now the web interface is half drawn, never completing:

I can still SSH in just fine, so I try resetting DRAC via racadm racreset once or twice, no change.  I execute a "rollback iDRAC.Embedded.1-1" which successfully puts me back to 2.63.60.61.  I decide to go to 2.80.80.80 instead; seems to work.  Finally, I jump to 2.82.82.82, issue returns.  Only now, when I roll back, my only option is 2.80.80.80 and it's begun doing the same thing.  So now I'm stuck where both versions stored in software inventory are broken.

I set a hostname and accessed using DNS name, same issue as when accessing via IP.

Any ideas?