Three gateway bridges are running on our Chirpstack server: EU868, US915, and AU915. It worked very well but suddenly without any configuration changes, the US915 and AU915 gateways stopped connecting to the server. Firewall UDP ports have been checked. No errors can be detected in the Chirpstack or gateway bridge log files.
level=info msg="integration/mqtt: connected to mqtt broker"
I would be very grateful for any advice on how to solve this problem.
