I have two new TH8320ZW1000 thermostats. These are NOT the ones sold on this forum.
My issues is both forget the time of day when there is a power interruption. I've changed the battery, installing a fresh high quality battery. No difference.
After a power interruption I am presented with two screens similar to the initial configuration screens. They are asking for the "Year, month day", then a "set time" screen. Both require pressing the "done" button to continue.
Has anyone seen this issue?