MKUserTrackingModeFollowWithHeading automatically deactivates when zoomed in

Originator:futuretap
Number:rdar://12804133 Date Originated:
Status:Open Resolved:
Product:iPhone SDK Product Version:6.1 beta 3
Classification:Other Bug Reproducible:Always
 
Please open the sample project from rdar://11915355 ("MKUserTrackingModeFollowWithHeading: annotations jump"). When tapping on the "Heading" button it generates 20 annotations around the current userLocation and enables MKUserTrackingModeFollowWithHeading.

Now zoom in closely.

Expected Results:
Heading mode should stay active.

Actual Results:
Heading mode is canceled and MapView snaps back to non rotated mode.

Regression:
Occurs since iOS 6 Vector based MapKit.

Notes:
see also: rdar://11915355

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