[Troubleshoot] [Cordova + Phaser 3] The preloader scene is being refreshed

So I used an image to cover the camera background to remove that problem and it worked but now I am faced with a problem any thing using Graphics object is flickering on the iOS all the time. I might need to use images to fix that but I think there must be a way to fix that bug. Also sometimes the play sound from phaser doesn’t work when the app is minimized and restored without no errors in the console or anything. Any ideas what is the reason?