How to push and pop scenes properly in Cocos2D v3.x - cocos2d-iphone

Question

I push a preloaded scene B onto scene A like this. The root node in the scene B has an animation that runs for ~2 seconds, and I want scene B to be popped when the animation is done. I think it should work like below. However it crashes on popScene. Does push/pop really work in Cocos2D v3?
SceneRedroom* sceneredroom = (SceneRedroom*)[self.ccscenewithSceneredroom getChildByName:#"SceneRedroom" recursively:NO];
[sceneredroom.animationManager setCompletedAnimationCallbackBlock:^(id sender) {
[[CCDirector sharedDirector] popScene];
}];
[[CCDirector sharedDirector] pushScene:self.ccscenewithSceneredroom];
The crashes I get are fairly random. It seems like some things are incorrectly deallocated or similar when pushing and/or popping scenes.

Answer 1

After further research, I managed to find a solution to the problem I was having through this post. I removed the CCDirector pause and resume in my pauseGame and resumeGame methods then added this:
//pause
[sprite.actionManager pauseTarget:sprite];
//resume
[sprite.actionManager resumeTarget:sprite];
This stopped the animation and kept the "paused" state even if the game is closed then reopened and I didn't even need to play with the AppDelegate class :). I hope this helps others too.
UPDATE: Just in case anybody else is creating a sprite using a loop, here's how I managed to create the pause and resume function for it:
[sprite.actionManager pauseAllRunningActions];
[sprite.actionManager resumeTargets:[NSSet setWithArray:spriteArray]];
note the difference between the two (resumeTarget and resumeTargets) then since resumeTargets would ask for NSSet, I simply passed the array objects into a NSSet with the above code.

Answer 2

void PauseScene::goToMainMenuScene(cocos2d::Ref *sender)
{
Director::getInstance()->resume();
auto scene = MainMenuScene::createScene();
Director::getInstance()->replaceScene(TransitionFade::create(TRANSITION_TIME, scene));
}
void PauseScene::resumeScene(cocos2d::Ref *sender)
{
Director::getInstance()->popScene();
}
void PauseScene::restartScene(cocos2d::Ref *sender)
{
Director::getInstance()->resume();
auto scene = GameScene::createScene();
Director::getInstance()->replaceScene(TransitionFade::create(TRANSITION_TIME, scene));
}