So interesting addition to this topic.I decided to turn on Developer
Options to see the uptime showing since the change back to Light theme
seemed to happen after a reboot. Turns out it's not actually rebooting.
The versions are not changing numbers ...
My suspicion (and yours) was confirmed without a doubt this morning. I
start work very early in the mornings and often times see the Hub do the
restart after update. So I made sure it was in dark mode when I woke up
and like clockwork I saw the resta...
I'm having the exact same problem and I've come to this same conclusion.
Those discreet overnight updates are resetting the theme reach time. No
they have not fixed it yet.