I bought 3 buttons + hub ~3 years ago. Worked most of the time the first 2 years, then they became very flaky and unreliable, so I unplugged the hub.
I'm trying again now, as it was quite cool product and want to give it another chance.
One of the buttons disconnects after few minutes: I keep pressing on it for ~10 seconds (trying to make it recognized by the hub), it blinks red. After 3-4 attempts, it finally blinks green twice, and the controller then works. I can use it few times in a row, but if I let it rest for 1 or 2 minutes, I have to do the long press dance again (red blinks..). I'm 1 meter from the hub -> totally unusable.
The 2 other buttons can stand a little bit longer (~10 minutes, 2 hours) before I have to reconnect them as well (long press with red blinking)
The hub is running firmware 4.5.0.
Any idea?