[aspiers]

Thanks for the info, this is really helpful!  Although I don't believe I ever had the dark mode at sunset feature enabled, although I think I did have the option enabled to reduce blue light at night which I'm guessing is part of the same mechanism and probably triggered by the same daily schedule. 

Has anyone tried disabling these features to see if that eliminates the issue? 

Also, Mike - if I had two Chromebooks linked via Bluetooth and they restarted at the same time, would they automatically relink to each other, and if so do you have any idea how long would that take?  Just thinking about the possible impact mid-performance.  That said, if it's 100% predictable when this is going to happen, it should be a LOT easier to work around even if it can't be avoided by disabling the feature as per above.