Having the exact same issue. This is really pretty ridiculous. I have three timers. One of the timers runs the program. The other two don’t. Their programs are pretty much identical.
Hub 1: 44:67:55:20:A6:02
Hub 2: 44:67:55:20:A6:B3
Timer 1: 44:67:55:11:BA:EA
Timer 2: 44:67:55:11:E1:9F
Timer 3 (the one that works): 44:67:55:11:DB:69
I’m on the verge of returning all this to Amazon as defective and going with a different brand.