Your panel is behaving similarly to the systems reported here:
I am able to send a cellular ping and request a response via broadband, which your panel appears to be providing. However, the panel is not receiving inbound broadband pings.
This can be an issue with the router. Do you have just the one access point for wifi? What model route do you use? What kind of ISP do you use? (cable, fiber, dsl, etc.)
If it is related to the linked issue report, the only confirmed resolution is a factory reset.