New firmware 8.1.3

[rwjr44]

After my vacation I was happy to see my Devialet 200 back from a warranty repair (burning smell), straight away installed the 8.1.3beta and decided to play it for a week.
Today the first listening session I find it quite musical, the strange mid bass thump has gone and I can play a bit louder (Raidho X1 and JL audio Fathom F110).
But the annoying thing is that the right channel is slightly louder then the left channel, pulling the soundstage to the right for half a meter.

All in all I am getting a bit frustrated with the Devialet experience, I won't be buying the second one to make it a 400. In my first system I am using Accuphase amplification for years, never had any problem, just turn it on and enjoy the music.

Has any furniture been moved or have other changes been made to/in the room? I recently moved a couch and found that the balance (and other things) of my system had changed. I repositioned the couch to its original position and everything was good again.