diff --git a/ios/lib/ReactNativeCameraKit/CKCamera.m b/ios/lib/ReactNativeCameraKit/CKCamera.m
index 858b2a2..1823ffa 100644
--- a/ios/lib/ReactNativeCameraKit/CKCamera.m
+++ b/ios/lib/ReactNativeCameraKit/CKCamera.m
@@ -17,7 +17,6 @@
 #import "RCTConvert.h"
 #endif
 
-
 #import "CKCamera.h"
 #import "CKCameraOverlayView.h"
 #import "CKGalleryManager.h"
@@ -823,6 +822,15 @@ RCT_ENUM_CONVERTER(CKCameraZoomMode, (@{
 
 #pragma mark - Frame for Scanner Settings
 
+- (void)didMoveToWindow {
+    [super didMoveToWindow];
+    if (self.sessionRunning && self.dataReadingFrame) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self startAnimatingScanner:self.dataReadingFrame];
+        });
+    }
+}
+
 - (void)setScannerOptions:(NSDictionary *)scannerOptions {
     if (scannerOptions[offsetForScannerFrame]) {
         self.frameOffset = [scannerOptions[offsetForScannerFrame] floatValue];
@@ -830,7 +838,6 @@ RCT_ENUM_CONVERTER(CKCameraZoomMode, (@{
     if (scannerOptions[heightForScannerFrame]) {
         self.heightFrame = [scannerOptions[heightForScannerFrame] floatValue];
     }
-    
     if (scannerOptions[colorForFrame]) {
         UIColor *acolor = [RCTConvert UIColor:scannerOptions[colorForFrame]];
         self.frameColor = (acolor) ? acolor : [UIColor whiteColor];
@@ -839,18 +846,21 @@ RCT_ENUM_CONVERTER(CKCameraZoomMode, (@{
 
 - (void)addFrameForScanner {
     CGFloat frameWidth = self.bounds.size.width - 2 * self.frameOffset;
-    self.dataReadingFrame = [[UIView alloc] initWithFrame:CGRectMake(0, 0, frameWidth, self.heightFrame)]; //
-    self.dataReadingFrame.backgroundColor = [UIColor clearColor];
-    [self createCustomFramesForView:self.dataReadingFrame];
-    [self addSubview:self.dataReadingFrame];
-    //[self.cameraPreviewView.layer addSublayer:self.dataReadingFrame.layer];
-    self.dataReadingFrame.center = self.center;
-    
-    [self startAnimatingScanner:self.dataReadingFrame];
-    [self addVisualEffects:self.dataReadingFrame.frame];
-    
-    CGRect visibleRect = [self.previewLayer metadataOutputRectOfInterestForRect:self.dataReadingFrame.frame];
-    self.metadataOutput.rectOfInterest = visibleRect;
+    if (!self.dataReadingFrame) {
+        self.dataReadingFrame = [[UIView alloc] initWithFrame:CGRectMake(0, 0, frameWidth, self.heightFrame)]; //
+        self.dataReadingFrame.center = self.center;
+        self.dataReadingFrame.backgroundColor = [UIColor clearColor];
+        [self createCustomFramesForView:self.dataReadingFrame];
+        [self addSubview:self.dataReadingFrame];
+        
+        
+        [self startAnimatingScanner:self.dataReadingFrame];
+        
+        [self addVisualEffects:self.dataReadingFrame.frame];
+        
+        CGRect visibleRect = [self.previewLayer metadataOutputRectOfInterestForRect:self.dataReadingFrame.frame];
+        self.metadataOutput.rectOfInterest = visibleRect;
+    }
 }
 
 - (void)createCustomFramesForView:(UIView *)frameView {
@@ -917,8 +927,13 @@ RCT_ENUM_CONVERTER(CKCameraZoomMode, (@{
 }
 
 - (void)startAnimatingScanner:(UIView *)inputView {
-    self.greenScanner = [[UIView alloc] initWithFrame:CGRectMake(2, 0, inputView.frame.size.width - 4, 2)];
-    self.greenScanner.backgroundColor = [UIColor whiteColor];
+    if (!self.greenScanner) {
+        self.greenScanner = [[UIView alloc] initWithFrame:CGRectMake(2, 0, inputView.frame.size.width - 4, 2)];
+        self.greenScanner.backgroundColor = [UIColor whiteColor];
+    }
+    if (self.greenScanner.frame.origin.y != 0) {
+        [self.greenScanner setFrame:CGRectMake(2, 0, inputView.frame.size.width - 4, 2)];
+    }
     [inputView addSubview:self.greenScanner];
     [UIView animateWithDuration:3 delay:0 options:(UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat) animations:^{
         CGFloat middleX = inputView.frame.size.width / 2;