[confusing ui] The heading value doesn't change when moving the slider only slightly

[digeff]

If it's on N, and I move the slider a little, it's still on N. I'd expect to see the value change.

[dlebu]

This is by design - the value returned by the API call will change even when moving slightly, but it is not displayed in the heading label. The label in the map does display the actual heading value.