[Bug]: Memory leaks while quickly switching between overview and following camera modes.

[MaximAlien]

Mapbox Navigation SDK version

v2.0.0

Steps to reproduce

1. Start memory leaks profiler.
2. Start active guidance navigation on iOS Simulator.
3. Repeatedly switch between overview and following camera modes.
4. Observe memory leaks related to OS_dispatch_group in profiler.

Expected behavior

Memory leaks should not occur.

Actual behavior

Memory leaks occur. For example:

Is this a one-time issue or a repeatable issue?

repeatable