diff --git a/AdNetworkSupport/Unity/MPUnityRouter.h b/AdNetworkSupport/Unity/MPUnityRouter.h
index afab6ac84..025e20d81 100644
--- a/AdNetworkSupport/Unity/MPUnityRouter.h
+++ b/AdNetworkSupport/Unity/MPUnityRouter.h
@@ -15,6 +15,8 @@
 @interface MPUnityRouter : NSObject <UnityAdsExtendedDelegate>
 
 @property (nonatomic, weak) id<MPUnityRouterDelegate> delegate;
+@property NSMutableDictionary* delegateMap;
+@property NSString* currentPlacementId;
 
 + (MPUnityRouter *)sharedRouter;
 
@@ -32,7 +34,9 @@
 - (void)unityAdsDidStart:(NSString *)placementId;
 - (void)unityAdsDidFinish:(NSString *)placementId withFinishState:(UnityAdsFinishState)state;
 - (void)unityAdsDidClick:(NSString *)placementId;
-
 - (void)unityAdsDidFailWithError:(NSError *)error;
 
+@optional
+- (void)unityAdsPlacementStateChanged:(NSString*)placementId oldState:(UnityAdsPlacementState)oldState newState:(UnityAdsPlacementState)newState;
+
 @end
diff --git a/AdNetworkSupport/Unity/MPUnityRouter.m b/AdNetworkSupport/Unity/MPUnityRouter.m
index b2b07f042..ba3eece3c 100644
--- a/AdNetworkSupport/Unity/MPUnityRouter.m
+++ b/AdNetworkSupport/Unity/MPUnityRouter.m
@@ -20,6 +20,13 @@ @interface MPUnityRouter ()
 
 @implementation MPUnityRouter
 
+- (id) init {
+    self = [super init];
+    self.delegateMap = [[NSMutableDictionary alloc] init];
+    
+    return self;
+}
+
 + (MPUnityRouter *)sharedRouter
 {
     return [[MPInstanceProvider sharedProvider] sharedMPUnityRouter];
@@ -28,8 +35,8 @@ + (MPUnityRouter *)sharedRouter
 - (void)requestVideoAdWithGameId:(NSString *)gameId placementId:(NSString *)placementId delegate:(id<MPUnityRouterDelegate>)delegate;
 {
     if (!self.isAdPlaying) {
-        self.delegate = delegate;
-
+        [self.delegateMap setObject:delegate forKey:placementId];
+        
         static dispatch_once_t unityInitToken;
         dispatch_once(&unityInitToken, ^{
             UADSMediationMetaData *mediationMetaData = [[UADSMediationMetaData alloc] init];
@@ -41,7 +48,7 @@ - (void)requestVideoAdWithGameId:(NSString *)gameId placementId:(NSString *)plac
 
         // Need to check immediately as an ad may be cached.
         if ([self isAdAvailableForPlacementId:placementId]) {
-            [self.delegate unityAdsReady:placementId];
+            [self unityAdsReady:placementId];
         }
         // MoPub timeout will handle the case for an ad failing to load.
     } else {
@@ -59,9 +66,7 @@ - (void)presentVideoAdFromViewController:(UIViewController *)viewController cust
 {
     if (!self.isAdPlaying && [self isAdAvailableForPlacementId:placementId]) {
         self.isAdPlaying = YES;
-
-        self.delegate = delegate;
-
+        self.currentPlacementId = placementId;
         [UnityAds show:viewController placementId:placementId];
     } else {
         NSError *error = [NSError errorWithDomain:MoPubRewardedVideoAdsSDKDomain code:MPRewardedVideoAdErrorUnknown userInfo:nil];
@@ -69,6 +74,10 @@ - (void)presentVideoAdFromViewController:(UIViewController *)viewController cust
     }
 }
 
+- (id<MPUnityRouterDelegate>)getDelegate:(NSString*) placementId {
+    return [self.delegateMap valueForKey:placementId];
+}
+
 - (void)clearDelegate:(id<MPUnityRouterDelegate>)delegate
 {
     if (self.delegate == delegate)
@@ -81,25 +90,49 @@ - (void)clearDelegate:(id<MPUnityRouterDelegate>)delegate
 
 - (void)unityAdsReady:(NSString *)placementId
 {
-    [self.delegate unityAdsReady:placementId];
+    if (!self.isAdPlaying) {
+        id delegate = [self getDelegate:placementId];
+        if (delegate != nil) {
+            [delegate unityAdsReady:placementId];
+        }
+    }
 }
 
 - (void)unityAdsDidError:(UnityAdsError)error withMessage:(NSString *)message {
-    [self.delegate unityAdsDidError:error withMessage:message];
+    id delegate = [self getDelegate:self.currentPlacementId];
+    if (delegate != nil) {
+        [delegate unityAdsDidError:error withMessage:message];
+    }
 }
 
 - (void)unityAdsDidStart:(NSString *)placementId {
-    [self.delegate unityAdsDidStart:placementId];
+    id delegate = [self getDelegate:placementId];
+    if (delegate != nil) {
+        [delegate unityAdsDidStart:placementId];
+    }
 }
 
 - (void)unityAdsDidFinish:(NSString *)placementId withFinishState:(UnityAdsFinishState)state {
-    [self.delegate unityAdsDidFinish:placementId withFinishState:state];
+    id delegate = [self getDelegate:placementId];
+    if (delegate != nil) {
+        [delegate unityAdsDidFinish:placementId withFinishState:state];
+    }
+    [self.delegateMap removeObjectForKey:placementId];
     self.isAdPlaying = NO;
 }
 
-- (void)unityAdsDidClick:(NSString *)placementId
-{
-    [self.delegate unityAdsDidClick:placementId];
+- (void)unityAdsDidClick:(NSString *)placementId {
+    id delegate = [self getDelegate:placementId];
+    if (delegate != nil) {
+        [delegate unityAdsDidClick:placementId];
+    }
+}
+
+- (void)unityAdsPlacementStateChanged:(NSString *)placementId oldState:(UnityAdsPlacementState)oldState newState:(UnityAdsPlacementState)newState {
+    id delegate = [self getDelegate:placementId];
+    if (delegate != nil && [delegate respondsToSelector:@selector(unityAdsPlacementStateChanged:oldState:newState:)]) {
+        [delegate unityAdsPlacementStateChanged:placementId oldState:oldState newState:newState];
+    }
 }
 
 @end
diff --git a/AdNetworkSupport/Unity/UnityAdsInterstitialCustomEvent.m b/AdNetworkSupport/Unity/UnityAdsInterstitialCustomEvent.m
index 2bc6e9438..6dd98d640 100644
--- a/AdNetworkSupport/Unity/UnityAdsInterstitialCustomEvent.m
+++ b/AdNetworkSupport/Unity/UnityAdsInterstitialCustomEvent.m
@@ -16,6 +16,7 @@
 
 @interface UnityAdsInterstitialCustomEvent () <MPUnityRouterDelegate>
 
+@property BOOL loadRequested;
 @property (nonatomic, copy) NSString *placementId;
 
 @end
@@ -27,8 +28,8 @@ - (void)dealloc
     [[MPUnityRouter sharedRouter] clearDelegate:self];
 }
 
-- (void)requestInterstitialWithCustomEventInfo:(NSDictionary *)info
-{
+- (void)requestInterstitialWithCustomEventInfo:(NSDictionary *)info {
+    self.loadRequested = YES;
     NSString *gameId = [info objectForKey:kMPUnityRewardedVideoGameId];
     self.placementId = [info objectForKey:kUnityAdsOptionPlacementIdKey];
     if (self.placementId == nil) {
@@ -74,7 +75,10 @@ - (void)handleAdPlayedForCustomEventNetwork
 
 - (void)unityAdsReady:(NSString *)placementId
 {
-    [self.delegate interstitialCustomEvent:self didLoadAd:placementId];
+    if (self.loadRequested) {
+        [self.delegate interstitialCustomEvent:self didLoadAd:placementId];
+        self.loadRequested = NO;
+    }
 }
 
 - (void)unityAdsDidError:(UnityAdsError)error withMessage:(NSString *)message