Devialet's answer on the stereo sync issue

[Yar36]

With the hope that this may be helpful to others:

After the DOS2 update, my Phantom Classics were constantly out of sync. At times, this was like a "cathedral" effect, as Devialet has described it, and at times it was far worse than that, particularly with percussive music. Also, the speakers were intermittently restarting themselves; this seemed to be correlated with sync problems, but I can't say so for sure.

After I filed a support ticket, Devialet pushed the 2.8.5 update. The update appears to have fixed the sync issue entirely. (One point that was not clear from Devialet's emailed instructions: when an update is "pushed" to your Phantoms, that means that it will appear in the update pane of the Devialet app, not that the Phantoms have been automatically updated without any user action. In other words, you have to apply the update yourself.) Once or twice since the update, one of the speakers has restarted itself, and so that remains an issue--albeit less of one that it was previously, since the frequency of spontaneous restarts appears to be much lower.

how long did it take once you opened the ticket that they sent you the push?
I opened my ticket weeks ago, but still no update (the agent took my serial numbers). 
I think I just have a bad agent... I’ve tried opening a new ticket and the same agent responded with a pretty nasty attitude...