Lyft driver app cause cellular to go offline

My friend's iPhone with cricket as a provider has a strange problem that can be 100% re-produced.

When I open the Lyft driver app and use cellular (5G or LTE has the same problem), it causes the iPhone to go offline (the internet browser is not loading, google Maps returns the offline result, and other applications say that the phone is offline). To be able to use cellular again, I have to turn cellular off and on again. This problem never occur if I connect to wi-fi. Lastest app version, lastest iOS version, kill app, delete app, not seem to be able to solve this issue. It so weird and bug me so that I have to ask this question.

I know that Lyft driver app doesn't develop by Apple but my question is that how can one application causes an network effect to the phone, as far as I know as an iOS developer I can only listen to the network change via "SCNetworkReachability" class.

Note: Only iPhone with has cricket as an provider has this problem. My other friends which ddifferent provider don't have this problem.