diff --git a/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m b/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
index ff46aa6a..0158beb1 100644
--- a/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
+++ b/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
@@ -342,8 +342,10 @@ static const CGFloat CheckBoxHeightWidth = 18.0;
         [self.checkMark updateCheckSelected:NO animated:animated];
     }
     
-    FormValidator *formValidator = ((MVMCoreUIDelegateObject *)self.delegate).formValidationProtocol.formValidatorModel;
-    [formValidator enableByValidation];
+    if (self.delegate && [self.delegate respondsToSelector:@selector(formValidationProtocol)] && [[self.delegate performSelector:@selector(formValidationProtocol)] respondsToSelector:@selector(formValidatorModel)]) {
+        FormValidator *formValidator = [[self.delegate performSelector:@selector(formValidationProtocol)] performSelector:@selector(formValidatorModel)];
+        [formValidator enableByValidation];
+    }
 }
 
 - (void)setColor:(nullable UIColor *)color forState:(UIControlState)state {
diff --git a/MVMCoreUI/BaseControllers/MFViewController.m b/MVMCoreUI/BaseControllers/MFViewController.m
index 1bd5e866..b6f71412 100644
--- a/MVMCoreUI/BaseControllers/MFViewController.m
+++ b/MVMCoreUI/BaseControllers/MFViewController.m
@@ -343,15 +343,24 @@
 - (BOOL)isOverridingRightButton {
     NSDictionary *rightPanelLinkDict = [self.loadObject.pageJSON dict:@"rightPanelButtonLink"];
     if (rightPanelLinkDict) {
-        [[MVMCoreActionHandler sharedActionHandler] handleActionWithDictionary:rightPanelLinkDict
-                                                                additionalData:nil
-                                                                      delegateObject:[self delegateObject]];
+        [[MVMCoreActionHandler sharedActionHandler] handleActionWithDictionary:rightPanelLinkDict additionalData:nil delegateObject:[self delegateObject]];
         return YES;
     } else {
         return NO;
     }
 }
 
+- (BOOL)isOverridingLeftButton {
+    NSDictionary *leftPanelLinkDict = [self.loadObject.pageJSON dict:@"leftPanelButtonLink"];
+    if (leftPanelLinkDict) {
+        [[MVMCoreActionHandler sharedActionHandler] handleActionWithDictionary:leftPanelLinkDict additionalData:nil delegateObject:[self delegateObject]];
+        return YES;
+    } else {
+        return NO;
+    }
+}
+
+
 - (void)setSupportShouldBeAccessible:(BOOL)supportShouldBeAccessible {
     
     MVMCoreUISplitViewController *splitViewController = [MVMCoreUISession sharedGlobal].splitViewController;
diff --git a/MVMCoreUI/Containers/TabBarController/MVMCoreUITabBarPageControlViewController.m b/MVMCoreUI/Containers/TabBarController/MVMCoreUITabBarPageControlViewController.m
index d06ca5f4..1d8481d6 100644
--- a/MVMCoreUI/Containers/TabBarController/MVMCoreUITabBarPageControlViewController.m
+++ b/MVMCoreUI/Containers/TabBarController/MVMCoreUITabBarPageControlViewController.m
@@ -139,6 +139,22 @@
     }
 }
 
+- (BOOL)isOverridingLeftButton {
+    if ([self.viewController respondsToSelector:@selector(isOverridingLeftButton)]) {
+        return [self.viewController performSelector:@selector(isOverridingLeftButton)];
+    } else {
+        return [super isOverridingLeftButton];
+    }
+}
+
+- (BOOL)isOverridingRightButton {
+    if ([self.viewController respondsToSelector:@selector(isOverridingRightButton)]) {
+        return [self.viewController performSelector:@selector(isOverridingRightButton)];
+    } else {
+        return [super isOverridingRightButton];
+    }
+}
+
 #pragma mark - View Cycle
 
 - (void)loadView {