As I can recognize on your pic, you use the German Corona warning app on your S5. It needs a very stable Bluetooth connection (the S5 supports Bluetooth 4.0 LE) and all the necessary Google APIs. This app only runs flawless with the latest MM (6.0.1) stock ROM. This can be a modified (debloated) one. The reason why it fails on Lineage or AOSP based ROMs: Samsung doesn't publish the source code for all drivers, so the developers can't fix this issues. I'm using the Covid 19 app too with a rooted stock based, modified ROM on my S5. The app works like it should without problems since nearly 20 days, a factory Android 6 is official still supported by the RKI programmers.It is as I suspected: With LineageOS 14.1 it is obviously not possible to use the Nearby.EXPOSURE_NOTIFICATION_API of Google Play Services. Although the Play Services are up to date (version 20.18.17, updated end of May) and Google writes in its documents that the functionality should be available from Android 6.0 on. I wonder what's causing it. There is only the error message as in the screenshot below.
Last edited: