Smart Things Hub disconnected from all 8 water leak sensors

All 8 of my Smart things water leak sensors suddenly disconnected from my Smart Things Hub. Can’t get them to reconnect even after re-booting hub twice.

I have had this problem for a few weeks since I received 48.3. How many devices and drivers do you have?

I only have 8 water leak sensors. I guess my 2 arlo cameras are also connected, but all has been working fine until today when all 8 water leak sensors showed offline