Last Fault A 4098 OVER VOLTAGE

[Soniclife]

Any updates on this over-voltage fault from anyone? I keep on getting the error occasionally, and can't get any useful info from Devialet support. Is it still happening to those who used to get the problem in the past? I don't think there was ever a FW fix for it. Recently, Mathiew Pernot sent me an alpha version (if that) with a potential fix, which did not help me (it made things worse if anything).
What puzzles me most is that the Voltage in my house is normally about 122V. I don't see how it can possibly get out of the range Devialet claims to handle. Obviously, there may be voltage spikes, but none of my other equipment has shown any sensitivity to them.

Have they gone back to telling you it's the incoming voltage? I'm convinced it's not but could believe support might change tune when they forget.