Layout Constraints Applied After App Loads

I have an Ionic app with a ion-header-bar. When the app first opens on my iOS phone (doesn’t matter which version), the NSLayout Constraints aren’t applied thus an empty header bar appears at the top overlapped by the iOS status bar… Once the content is loaded, the constraints are applied and the header bar drops and positions itself below the status bar. This only occurs when the app first loads.

Is there any way to fix this?