Fix SystemSpeechSynthesizer related main thread hang on NavigationVie…

…wController creation (#4617)

* Don't check if AVSpeechSynthesizer.isSpeaking when unmuting it

* add changelog entry

CHANGELOG.md

@@ -36,6 +36,7 @@
 * Removed `NavigationEventsManager.init(activeNavigationDataSource:passiveNavigationDataSource:accessToken:mobileEventsManager:)` in favor of `NavigationEventsManager.init(activeNavigationDataSource:passiveNavigationDataSource:accessToken:)`. ([#4572](https://github.com/mapbox/mapbox-navigation-ios/pull/4572))
 * Fixed a rare issue that could lead to memory corruption under specific conditions. This was resolved by replacing the internal image downloader with brand new actor-based implementation. ([#4588](https://github.com/mapbox/mapbox-navigation-ios/pull/4588))
 * Fixed the possible situation when the upcoming route leg is rendered above the active route leg. ([#4588](https://github.com/mapbox/mapbox-navigation-ios/pull/4588))
+* Fixed a main thread hang on NavigationViewController creation. ([#4617](https://github.com/mapbox/mapbox-navigation-ios/pull/4617))
 
 ## v2.17.0
 

Sources/MapboxNavigation/SystemSpeechSynthesizer.swift

@@ -13,7 +13,7 @@ open class SystemSpeechSynthesizer: NSObject, SpeechSynthesizing {
     public weak var delegate: SpeechSynthesizingDelegate?
     public var muted: Bool = false {
         didSet {
-            if isSpeaking {
+            if muted, isSpeaking {
                 interruptSpeaking()
             }
         }