Unknown error when the app becomes active

Homey version: 7.1.3
iOS App version:
iOS version: 14.8

Problem description:
Frequently the “Unknown error” is displayed when the app becomes active. After a retry the app does


Does iOS / your phone disconnect WiFi when not in use?

Since messages and notifications keep coming in I suspect that it does not disconnect. It happens when the app is pushed to the background (inactive) and the device is locked and after a short period the device is unlocked again and the App is activated (foreground) whilst stay connected to the same WIFI AP.

I recognize this situation. I have not investigated nor have I sent a mail to support. Pressing the reconnect button always solved this.

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