Can any body tell me why this happens, Scenes from bundles crashes only on ios (iphone 7 plus) and only when i try to unload them or change the scene from a bundle scene to a normal scene?

This is the weirdest behavior, I ever encountered in unity, here is the situation: I have a game with 2 scenes embedded in the game and on scene uploaded as an asset bundle, For Editor: i can download the scene, load it play it and leave it to other scenes and play it again no problem. For Android: i can download the scene, load it play it and unload it and move to other scenes no problem. For ios: i can download it, load it and play it, once i try to leave the scene or unload it, the game crashes on ios!!! I can't debug on xcode, i use windows based system and all my builds are made on the cloud. Can anyone throw any input!! maybe you encountered the same behavior? thanks