Something I noticed with my fobs (mine are the older one with shapes on the buttons instead of letters and people icons). When I press a button, a red light inside the fob flashes about 3 times over 5 seconds when I’m home. If I try to press that same button during that time, the command doesn’t always go through. That’s true for both fobs. It’s not a big deal to wait 4 or 5 seconds in between each button push.
However, when I’m away, one fob doesn’t light up at all when I push a button. I assume that’s because it recognizes that it’s away from the hub, so it’s saving battery. The other fob flashes the red light quickly 3 times over a second or so when I’m away. I wonder why they behave differently.