After one is done programming in Genie 2, the software gives out 2 options, to save the programmed data in the hearing instrument and/or in the database on the computer. The normal course of action would be to save in both places. After the choice is made, the hearing aids will reboot automatically but will come back up with the saved data inside the aids.
My only guess is that it’s possible that your audi might have forgotten to go through this Save & Exit routine and let you walk out with the newly programmed data temporarily stored in the aids during the reprogramming process, but not permanently saved into your hearing aids. So the next day, after the recharge process, the aids reboot themselves automatically and came up with the original default data in the aids (before the reprogramming took place at the audi’s) because the newly reprogrammed data was never saved into the aid in the first place.
That’s the only scenario I can think of, assuming that there’s nothing wrong with the brand new aids. But of course the aids themselves could have become defective somehow as well. But it’s very unlikely that BOTH aids would become defective the next day at the same time in the same way like that.
Why your audi could not reprogram your aids via the Remote Support, I have no idea. But I don’t have any personal experience with doing Remote Programming myself because I’m a DIY, so I don’t really know that process myself to guess what could have gone wrong there.