@david.hendon Since the 0.44.0.0 update (I wish ReSound would stick with a consistent nomenclature!) was back around April 6th of this year (New Firmware Update for ReSound Quattro's), are you sure that both HA’s both weren’t already on the 0.44.0.0 update, but you didn’t take notice before, both wanted to update to 0.45.0.0 and one failed, the other didn’t? (in spite of the notice that both updates were successful). I’m surprised if the both had earlier (0.43.0.0) or different firmware versions to begin with, that whichever one was less than 0.44.0.0 didn’t want to try to update until now. Perhaps the other possibility is that one made the leap from 0.43.0.0 to 0.45.0.0 and for the other that leap was a bridge too far and it only landed on 0.44.0.0!
Good luck with the Noahlink Wireless. Good to have your HA’s well-charged up when you try. It takes quite a few minutes.