Just want to report that this has also been happening to me randomly for
at least a couple of weeks if not more. Was dark mode this morning and
at some point in the day it changed back to light mode. I sent feedback
in the Hub like the posts suggeste...
So I was just chatting with Vont Home support and it looks like there's
an issue on there side causing the problem. They said they expect to
have it fixed within 24 hours.
Bump. Having the exact same issue. This morning was fine then I tried a
few minutes ago and nothing. I have about 25 other devices linked and
they all work, just Vont devices don't respond to Google Home.