Hi there! I'm here to help you with the issue of the sender app in the target phone getting logged out. Let's see if we can figure this out together.

To start, could you provide a bit more detail? For example, do you notice if this happens at specific times, or does it seem to happen randomly? Also, are there any error messages that appear when the app logs out?

In the meantime, I can suggest a few initial troubleshooting steps to see if they resolve the issue:

1. Check Network Connection: Ensure that the target phone has a stable internet connection, as a poor connection can sometimes cause unexpected logouts.

2. App Settings: Open the TrackView sender app and check if there are any settings related to automatic logout or session timeout. Adjust them if necessary.

3. Clear Cache and Data: Under the target phone's settings, navigate to Apps > TrackView > Storage and tap on "Clear Cache" and "Clear Data." This may help reset the app. Please note that clearing data may require logging in again.

4. Reinstall the App: If the issue persists, consider uninstalling and then reinstalling the TrackView app on the target phone. This can resolve any underlying issues with the app installation.

Please try these suggestions and let me know what you find out! If the problem continues, we can explore more advanced troubleshooting steps.