Arcadyan failing?

We've had T-Mobile HSI for a few years now in metro Atlanta. We decided to try it before the pandemic and it's worked so well we've kept it ever since. Hard to beat at $30/month and no wires into the house.

Recently the internet connection has dropped about 4 times. On one occasion the gateway rebooted on its own (or via T-Mobile?) and I've power cycled it manually the other three times and every time the internet returns to normal.

Is this a sign of a failing gateway or maybe just maintenance in the area?

Thanks!