Do not send willReroute notification if a reroute is already in progress (#3772)

* Do not send willReroute notification if a reroute is already in progress

* Add changelog

Author: S2Ler

CHANGELOG.md

@@ -25,6 +25,7 @@
 * Fixed a crash starting turn-by-turn navigation on some routes that included bridges and restricted-access roads. ([#3765](https://github.com/mapbox/mapbox-navigation-ios/pull/3765))
 * Fixed an issue where the route line appeared to begin away from the user’s current location after the route was refreshed. ([#3781](https://github.com/mapbox/mapbox-navigation-ios/pull/3781))
 * Fixed a memory leak after ending a turn-by-turn navigation session. ([#3782](https://github.com/mapbox/mapbox-navigation-ios/pull/3782))
+* Fixed an issue where `RouteControllerWillReroute` notification was incorrectly sent when a reroute was already in progress. ([#3772](https://github.com/mapbox/mapbox-navigation-ios/pull/3772))
 * Fixed an issue when `SimulatedLocationManager` could freeze the main thread when working with long routes. The manager now calls delegate methods from a background thread. ([#3672](https://github.com/mapbox/mapbox-navigation-ios/pull/3672))
 * Fixed an issue where initial puck position can be incorrect when `NavigationViewController` is presented. ([#3773](https://github.com/mapbox/mapbox-navigation-ios/pull/3773))
 

Sources/MapboxCoreNavigation/RouteController.swift

@@ -684,14 +684,13 @@ extension RouteController: Router {
             }
         }
 
-        announceImpendingReroute(at: location)
-        
-        self.lastRerouteLocation = location
-        
         // Avoid interrupting an ongoing reroute
         if isRerouting { return }
         isRerouting = true
-        
+
+        announceImpendingReroute(at: location)
+        self.lastRerouteLocation = location
+
         calculateRoutes(from: location, along: progress) { [weak self] (session, result) in
             guard let self = self else { return }