diff --git a/SensorsAnalyticsSDK.podspec b/SensorsAnalyticsSDK.podspec
index 66be07e5..75281c0e 100644
--- a/SensorsAnalyticsSDK.podspec
+++ b/SensorsAnalyticsSDK.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "SensorsAnalyticsSDK"
-  s.version      = "4.4.3"
+  s.version      = "4.4.4"
   s.summary      = "The official iOS SDK of Sensors Analytics."
   s.homepage     = "http://www.sensorsdata.cn"
   s.source       = { :git => 'https://github.com/sensorsdata/sa-sdk-ios.git', :tag => "v#{s.version}" }
diff --git a/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/SAScrollViewDelegateProxy.m b/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/SAScrollViewDelegateProxy.m
index f7298090..aea4718c 100644
--- a/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/SAScrollViewDelegateProxy.m
+++ b/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/SAScrollViewDelegateProxy.m
@@ -34,29 +34,30 @@ @implementation SAScrollViewDelegateProxy
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
     // 防止某些场景下循环调用
-    if (tableView.sensorsdata_indexPath == indexPath) {
+    if ([tableView.sensorsdata_delegateHashTable containsObject:self]) {
         return;
     }
-    tableView.sensorsdata_indexPath = indexPath;
-
+    [tableView.sensorsdata_delegateHashTable addObject:self];
+    
     SEL methodSelector = @selector(tableView:didSelectRowAtIndexPath:);
     [SAScrollViewDelegateProxy trackEventWithTarget:self scrollView:tableView atIndexPath:indexPath];
     [SAScrollViewDelegateProxy invokeWithTarget:self selector:methodSelector, tableView, indexPath];
-
-    tableView.sensorsdata_indexPath = nil;
+    
+    [tableView.sensorsdata_delegateHashTable removeAllObjects];
 }
 
 - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
-    if (collectionView.sensorsdata_indexPath == indexPath) {
+    // 防止某些场景下循环调用
+    if ([collectionView.sensorsdata_delegateHashTable containsObject:self]) {
         return;
     }
-    collectionView.sensorsdata_indexPath = indexPath;
-
+    [collectionView.sensorsdata_delegateHashTable addObject:self];
+    
     SEL methodSelector = @selector(collectionView:didSelectItemAtIndexPath:);
     [SAScrollViewDelegateProxy trackEventWithTarget:self scrollView:collectionView atIndexPath:indexPath];
     [SAScrollViewDelegateProxy invokeWithTarget:self selector:methodSelector, collectionView, indexPath];
-
-    collectionView.sensorsdata_indexPath = nil;
+    
+    [collectionView.sensorsdata_delegateHashTable removeAllObjects];
 }
 
 + (void)trackEventWithTarget:(NSObject *)target scrollView:(UIScrollView *)scrollView atIndexPath:(NSIndexPath *)indexPath {
diff --git a/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.h b/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.h
index 4315e4e6..6e538de0 100644
--- a/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.h
+++ b/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.h
@@ -24,7 +24,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface UITableView (AutoTrack)
 
-@property (nonatomic, strong, nullable) NSIndexPath *sensorsdata_indexPath;
+@property (nonatomic, strong, nullable) NSHashTable *sensorsdata_delegateHashTable;
 
 - (void)sensorsdata_setDelegate:(id <UITableViewDelegate>)delegate;
 
@@ -32,7 +32,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface UICollectionView (AutoTrack)
 
-@property (nonatomic, strong, nullable) NSIndexPath *sensorsdata_indexPath;
+@property (nonatomic, strong, nullable) NSHashTable *sensorsdata_delegateHashTable;
 
 - (void)sensorsdata_setDelegate:(id <UICollectionViewDelegate>)delegate;
 
diff --git a/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.m b/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.m
index cad35835..6ce72fd7 100644
--- a/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.m
+++ b/SensorsAnalyticsSDK/AutoTrack/AppClick/Cell/UIScrollView+SAAutoTrack.m
@@ -29,17 +29,22 @@
 #import "SAConstants+Private.h"
 #import "SAAutoTrackManager.h"
 
-static const void *kSATableViewIndexPath = &kSATableViewIndexPath;
-static const void *kSACollectionViewIndexPath = &kSACollectionViewIndexPath;
+static const void *kSATableViewDelegateHashTable = &kSATableViewDelegateHashTable;
+static const void *kSACollectionViewDelegateHashTable = &kSACollectionViewDelegateHashTable;
 
 @implementation UITableView (AutoTrack)
 
-- (void)setSensorsdata_indexPath:(NSIndexPath *)indexPath {
-    objc_setAssociatedObject(self, kSATableViewIndexPath, indexPath, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+- (void)setSensorsdata_delegateHashTable:(NSHashTable *)delegateHashTable {
+    objc_setAssociatedObject(self, kSATableViewDelegateHashTable, delegateHashTable, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
 }
 
-- (NSIndexPath *)sensorsdata_indexPath {
-    return  objc_getAssociatedObject(self, kSATableViewIndexPath);
+- (NSHashTable *)sensorsdata_delegateHashTable {
+    NSHashTable *delegateHashTable = objc_getAssociatedObject(self, kSATableViewDelegateHashTable);
+    if (!delegateHashTable) {
+        delegateHashTable = [NSHashTable weakObjectsHashTable];
+        self.sensorsdata_delegateHashTable = delegateHashTable;
+    }
+    return delegateHashTable;
 }
 
 - (void)sensorsdata_setDelegate:(id <UITableViewDelegate>)delegate {
@@ -66,12 +71,17 @@ - (void)sensorsdata_setDelegate:(id <UITableViewDelegate>)delegate {
 
 @implementation UICollectionView (AutoTrack)
 
-- (void)setSensorsdata_indexPath:(NSIndexPath *)indexPath {
-    objc_setAssociatedObject(self, kSACollectionViewIndexPath, indexPath, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+- (void)setSensorsdata_delegateHashTable:(NSHashTable *)delegateHashTable {
+    objc_setAssociatedObject(self, kSACollectionViewDelegateHashTable, delegateHashTable, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
 }
 
-- (NSIndexPath *)sensorsdata_indexPath {
-    return  objc_getAssociatedObject(self, kSACollectionViewIndexPath);
+- (NSHashTable *)sensorsdata_delegateHashTable {
+    NSHashTable *delegateHashTable = objc_getAssociatedObject(self, kSACollectionViewDelegateHashTable);
+    if (!delegateHashTable) {
+        delegateHashTable = [NSHashTable weakObjectsHashTable];
+        self.sensorsdata_delegateHashTable = delegateHashTable;
+    }
+    return delegateHashTable;
 }
 
 - (void)sensorsdata_setDelegate:(id <UICollectionViewDelegate>)delegate {
diff --git a/SensorsAnalyticsSDK/Core/Flow/SAFlowData.m b/SensorsAnalyticsSDK/Core/Flow/SAFlowData.m
index 591875f8..80fef95d 100644
--- a/SensorsAnalyticsSDK/Core/Flow/SAFlowData.m
+++ b/SensorsAnalyticsSDK/Core/Flow/SAFlowData.m
@@ -124,7 +124,7 @@ - (SAIdentifier *)identifier {
 }
 
 - (void)setProperties:(NSDictionary *)properties {
-    [self setParamWithKey:kSAFlowDataProperties value:properties];
+    [self setParamWithKey:kSAFlowDataProperties value:[properties copy]];
 }
 
 - (NSDictionary *)properties {
diff --git a/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m b/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m
index 47ee61f0..cec08468 100755
--- a/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m
+++ b/SensorsAnalyticsSDK/Core/SensorsAnalyticsSDK.m
@@ -62,7 +62,7 @@
 #import "SASessionPropertyPlugin.h"
 #import "SAEventStore.h"
 
-#define VERSION @"4.4.3"
+#define VERSION @"4.4.4"
 
 void *SensorsAnalyticsQueueTag = &SensorsAnalyticsQueueTag;
 
diff --git a/SensorsAnalyticsSDK/Location/SALocationManager.m b/SensorsAnalyticsSDK/Location/SALocationManager.m
index 547a9cd6..ed1c1d7a 100644
--- a/SensorsAnalyticsSDK/Location/SALocationManager.m
+++ b/SensorsAnalyticsSDK/Location/SALocationManager.m
@@ -138,9 +138,16 @@ - (void)startUpdatingLocation {
         if (self.isUpdatingLocation) {
             return;
         }
-        //判断当前设备定位服务是否打开
-        if (![CLLocationManager locationServicesEnabled]) {
-            SALogWarn(@"location service is not enabled on the device");
+        
+        // 判断当前设备定位授权的状态
+        CLAuthorizationStatus status;
+        if (@available(iOS 14.0, *)) {
+            status = self.locationManager.authorizationStatus;
+        } else {
+            status = [CLLocationManager authorizationStatus];
+        }
+        if ((status == kCLAuthorizationStatusDenied) || (status == kCLAuthorizationStatusRestricted)) {
+            SALogWarn(@"location authorization status is denied or restricted");
             return;
         }