Did you also start the Exclude on the Device during that time? I included my GE FanController (purchased in 2018, didn't crack the seal til a week or two ago,) and it included right away by clicking the On button once.
I Excluded Included multiple times.. I began that experiment by Joining the Fan Controller to my Development Hub, but after I got it "nicely packaged" I Excluded it and put it onto one of my Production Hubs and it's been responding to Temperature updates since.. night and day.
