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Installing our app interferes with network connection in another app
Apologies if this is not the correct topic to post under. EpochField 5.2 is our application. It's a .NET MAUI application built against XCode 16. A customer of ours uses another app, TN3270, to connect to a mainframe host. After installing our app on an iPad and restarting the device, the TN3270 app will disconnect when suspended. Uninstalling our app (EpochField) will allow the TN3270 to suspend without disconnecting. We have tried removing background services, setting UIRequiresFullScreen to false or removing it entirely, and several other ideas. The only remedy seems to be uninstalling EpochField. On an iPad device: Install MochaSoft’s TN3270 app (free version is fine). Create a connection to ssl3270.nccourts.org, port 2023, SSL/TLS turned on, keep alive turned on. Verify that you can connect. Suspend the app by swiping up or choosing another app. Go back to TN3270 and verify that the app has not disconnected. Install EpochField 5.2. Do not run or configure the app, just install it. Repeat step 2. Restart the device. Open EpochField 5.2. You do not need to configure the app or login. Sometimes it isn't necessary to ever open EpochField to get the disconnects, but this is the most reliable way to reproduce the situation. Repeat step 2. The TN3270 app will now disconnect when suspended, even if EpochField is closed. You may need to wait a few seconds after suspending. Uninstall EpochField 5.2. Repeat step 2: the TN3270 app will now remain connected when suspended.
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Dec ’25