SIP Registration Fails in Release Mode on First Launch (No SharedPreferences Data)

[kevalKathiriya258]

when user first time install app from testflight then after open app and send register request that time app gone crash.

161027.153 [959523] (Callbacks.cpp:180): Callback: 30 accId:1 s:0
[ERROR:flutter/shell/common/shell.cc(1057)] The 'siprix_voip_sdk' channel sent a message from native to Flutter on a non-platform thread. Platform channel messages must be sent on the platform thread. Failure to do so may result in data loss or crashes, and must be fixed in the plugin or application code creating that channel.
See https://docs.flutter.dev/platform-integration/platform-channels#channels-and-platform-threading for more information.
flutter: event OnAccountRegState {accId: 1, response: 200 OK, regState: 0}

[siprix]

It can't be reason of issue.
According to your message - when app started second time it doesn't crash, but it sends events in the same way.
Can you plz collect more details including libraries log files?

[siprix]

We published new version (1.0.14) of the plugin, where covered error from your fist post.
Now iOS sends native messages from UI thread.
Plz update and check in your environment/app.

[kevalKathiriya258]

Dear siprix,

I’m encountering a critical issue with SIP registration in my Flutter app when running in release mode.

Issue Description:
When the app is freshly installed and launched in release mode, the SIP registration fails the first time if there is no existing SharedPreferences data. The SIP never registers unless I previously ran the app in debug mode and saved some data to SharedPreferences.

Steps to Reproduce:
Install the app in release mode on a fresh device (or clear app data).

Try registering the SIP account — it fails or silently does nothing.

Then, install and run the same app in debug mode and register the SIP once — it works.

Now reinstall the release mode build — SIP registration works fine.

This indicates that SIP registration depends on SharedPreferences data, which is not available on first install, and causes it to fail silently in release builds.

Additional Notes:
The issue does not occur in debug mode.

Once SharedPreferences are populated (even via debug mode), the SIP registration works in release.

This issue can be seen in the attached screen recording:
📹 Video Evidence

Could you please investigate why SIP registration fails without SharedPreferences in release mode and whether this is a known issue?

Looking forward to your assistance.