Got the same problem on two devices today: iPhone 6 Plus and iPad, iOS 12.4.4. The compass and the map orientation in L4C stopped working properly. The compass heading is frozen on the same value, the map rotation switches between two fixed settings, the North Up and the Frozen Value of compass heading. The distance to the cache is still being shown correctly. When I try to navigate to different caches, the position of the compass arrow jumps to the new direction, heading stays the same.
I tried to play with compass calibration both in the app and in the system, tried to reboot the device and reinstall the app, but the problem still exists. The Compass app on the iPhone, map orientation in Maps, and the compass in Cachly work absolutely normal.
Any idea how to fix this issue? Has anyone else with the same problem?