Greetings siviliya,
To help isolate the network being the culprit of the issue, test and see if the behavior occurs when your iPhone is connected to a different network.
Additionally, test the behavior after restarting your iPhone and after updating to iOS 16.2. Taking these steps can help resolve issues related to the software. See those suggestions here: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support
"Restart your device
Restart your iPhone or restart your iPad. Then open the app to see if it works as expected.
Check for updates
To see if updates are available for the app, open the App Store, tap your profile icon, then scroll down to see if updates are available. If updates aren't available for the app, update the software on your iPhone or iPad."
Let us know if that helps.
Kind regards.