The app becomes bogged down when turning on internet data

Expected behavior

Lumicall is a SIP client application. I want to open and manage some needs in this application, such as adding even friend's mobile number and make some calls. but I am getting bad behavior in this app. The app becomes bogged down when turning on internet data.

Actual behavior

When i open this app, first i turn off internet data, after I entered into the application, I revived the internet data and I want to write some names in (user @ domian), but this app is stuck and I can not make anything else. I can only turn off internet data, and this app becomes normal again.

How to reproduce

• Download app Lumicall (SIP softphone)
• Turn off internet data android
• Go to the app
• Revive internet data android
• The application becomes stuck
• Apl: Lumicall version 1.13.1
• Operating system: Oppo a57 version android 6.0.1

Recording Of The Bug

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