diff --git a/UnitTests/MPIdentityCachingTests.m b/UnitTests/MPIdentityCachingTests.m
index 36035c09..8ab70dd7 100644
--- a/UnitTests/MPIdentityCachingTests.m
+++ b/UnitTests/MPIdentityCachingTests.m
@@ -23,7 +23,7 @@ + (void)cacheIdentityResponse:(nonnull MPIdentityCachedResponse *)cachedResponse
 + (nullable MPIdentityCachedResponse *)getCachedIdentityResponseForEndpoint:(MPEndpoint)endpoint identities:(nonnull NSDictionary *)identities;
 + (nullable NSDictionary<NSString*, NSDictionary*> *)getCache;
 + (void)setCache:(nullable NSDictionary<NSString*, NSDictionary*> *)cache;
-+ (nonnull NSString *)keyWithEndpoint:(MPEndpoint)endpoint identities:(nonnull NSDictionary *)identities;
++ (nullable NSString *)keyWithEndpoint:(MPEndpoint)endpoint identities:(nonnull NSDictionary *)identities;
 + (nullable NSDictionary *)identitiesFromIdentityRequest:(nonnull MPIdentityHTTPBaseRequest *)identityRequest;
 + (nullable NSString *)hashIdentities:(NSDictionary *)identities;
 + (nullable NSString *)serializeIdentities:(NSDictionary *)identities;
diff --git a/mParticle-Apple-SDK/Network/MPNetworkCommunication.m b/mParticle-Apple-SDK/Network/MPNetworkCommunication.m
index 46448b3c..816cbcc5 100644
--- a/mParticle-Apple-SDK/Network/MPNetworkCommunication.m
+++ b/mParticle-Apple-SDK/Network/MPNetworkCommunication.m
@@ -809,6 +809,9 @@ - (void)identityApiRequestWithURL:(NSURL*)url identityRequest:(MPIdentityHTTPBas
                 responseDictionary = nil;
                 success = NO;
                 MPILogError(@"Identity response serialization error: %@", [serializationError localizedDescription]);
+            } else {
+                responseCode = cachedResponse.statusCode;
+                success = YES;
             }
         } @catch (NSException *exception) {
             responseDictionary = nil;
diff --git a/mParticle-Apple-SDK/Persistence/MPIdentityCaching.m b/mParticle-Apple-SDK/Persistence/MPIdentityCaching.m
index d091cb9c..beca0c52 100644
--- a/mParticle-Apple-SDK/Persistence/MPIdentityCaching.m
+++ b/mParticle-Apple-SDK/Persistence/MPIdentityCaching.m
@@ -158,8 +158,13 @@ + (void)setCache:(nullable NSDictionary<NSString*, NSDictionary*> *)cache {
     [[MPIUserDefaults standardUserDefaults] setMPObject:cache forKey:kMPIdentityCachingCachedIdentityCallsKey userId:@0];
 }
 
-+ (nonnull NSString *)keyWithEndpoint:(MPEndpoint)endpoint identities:(nonnull NSDictionary *)identities {
-    return [NSString stringWithFormat:@"%ld::%@", (long)endpoint, [self hashIdentities:identities]];
++ (nullable NSString *)keyWithEndpoint:(MPEndpoint)endpoint identities:(nonnull NSDictionary *)identities {
+    NSString *hash = [self hashIdentities:identities];
+    if (!hash) {
+        return nil;
+    }
+    NSString *key = [NSString stringWithFormat:@"%ld::%@", (long)endpoint, hash];
+    return key;
 }
 
 + (nullable NSDictionary *)identitiesFromIdentityRequest:(nonnull MPIdentityHTTPBaseRequest *)identityRequest {
@@ -187,7 +192,8 @@ + (nullable NSDictionary *)identitiesFromIdentityRequest:(nonnull MPIdentityHTTP
             if (![identityType isKindOfClass:[NSString class]]) {
                 return nil;
             }
-            identities[identityType] = change;
+            // Hash the dictionary to get a reproducible string value
+            identities[identityType] = [self hashIdentities:change];
         }
         return identities;
     }
@@ -197,6 +203,10 @@ + (nullable NSDictionary *)identitiesFromIdentityRequest:(nonnull MPIdentityHTTP
 
 + (nullable NSString *)hashIdentities:(NSDictionary *)identities {
     NSString *serializedIdentities = [self serializeIdentities:identities];
+    if (!serializedIdentities) {
+        return nil;
+    }
+    
     NSString *hashedString = [self sha256Hash:serializedIdentities];
     return hashedString;
 }