Compass iOS

Since iOS 11, Compass is not working anymore on iPhone (I tested on multiple iPhone 6S's all under latest updates of iOS 11, so it's not device related). The level is still working fine, and the GPS coordinates are also displayed correctly, however the compass needle is frozen in a vertical position (i.e. pointing to the top of the screen). No more "calibration" when opening the app, no more compass functionality.

I removed the app, and installed it again from the App Store, no luck.

When will Apple provide a fix for this one ?