AndroidRuntime exception on app restart after app is open a long time

My xamarins forms app is crashing immediately on startup. This only happens after the app has been sitting on for ~1 hr, closed, and then opened again. Once it crashes like this one time, the app will then crash every time I try launching it until I plug it in and debug with Visual Studio, at which point it stops crashing.

Full stack trace captured from logcat:

Time    Device Name Type    PID Tag Message
11-25 22:50:51.794  Google Pixel    Error   21626   AndroidRuntime  android.runtime.JavaProxyThrowable: System.NullReferenceException: Object reference not set to an instance of an object
  at Xamarin.Forms.Platform.Android.AppCompat.Platform.LayoutRootPage (Xamarin.Forms.Page page, System.Int32 width, System.Int32 height) [0x00034] in <6b73296523894c3d8d57f5a8e3480a43>:0 
  at Xamarin.Forms.Platform.Android.AppCompat.Platform.Xamarin.Forms.Platform.Android.IPlatformLayout.OnLayout (System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b) [0x0000a] in <6b73296523894c3d8d57f5a8e3480a43>:0 
  at Xamarin.Forms.Platform.Android.PlatformRenderer.OnLayout (System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b) [0x00018] in <6b73296523894c3d8d57f5a8e3480a43>:0 
  at Android.Views.ViewGroup.n_OnLayout_ZIIII (System.IntPtr jnienv, System.IntPtr native__this, System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b) [0x00009] in <a10f61e70eeb434e952fef884856c199>:0 
  at (wrapper dynamic-method) System.Object.18(intptr,intptr,bool,int,int,int,int)
    at md51558244f76c53b6aeda52c8a337f2c37.PlatformRenderer.n_onLayout(Native Method)
    at md51558244f76c53b6aeda52c8a337f2c37.PlatformRenderer.onLayout(PlatformRenderer.java:63)
    at android.view.View.layout(View.java:20672)
    at android.view.ViewGroup.layout(ViewGroup.java:6194)
    at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1083)
    at android.view.View.layout(View.java:20672)
    at android.view.ViewGroup.layout(ViewGroup.java:6194)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
    at android.view.View.layout(View.java:20672)
    at android.view.ViewGroup.layout(ViewGroup.java:6194)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
    at android.view.View.layout(View.java:20672)
    at android.view.ViewGroup.layout(ViewGroup.java:6194)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
    at android.view.View.layout(View.java:20672)
    at android.view.ViewGroup.layout(ViewGroup.java:6194)
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
    at android.view.View.layout(View.java:20672)
    at android.view.ViewGroup.layout(ViewGroup.java:6194)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
    at com.android.internal.policy.DecorView.onLayout(DecorView.java:753)
    at android.view.View.layout(View.java:20672)
    at android.view.ViewGroup.layout(ViewGroup.java:6194)
    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2793)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2320)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1460)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7184)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:949)
    at android.view.Choreographer.doCallbacks(Choreographer.java:761)
    at android.view.Choreographer.doFrame(Choreographer.java:696)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:935)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
  Force finishing activity com.companyname.BingoBongo/md576593553c14f400ecd2910c52fe340e6.MainActivity

Here is my App.xaml.cs (it seems to be crashing either here or before because the crashes don't show up in my AppCenter crash log):

public partial class App : Application
    {
        private IFirebaseAuthService _firebaseAuthService;

        public App()
        {
            InitializeComponent();
            SetUpUnity();
            // no try catch around this line, but crashes were happening before it was added
            _firebaseAuthService = ServiceLocator.Current.GetInstance<IFirebaseAuthService>();
        }

        private void StartAppStore()
        {
            // no try catch around this line, but crashes were happening before it was added
            AppCenter.Start("android=[my-app-key];",
                  typeof(Analytics), typeof(Crashes));
        }

        private void SetUpUnity()
        {
            try
            {
                var unityContainer = new UnityContainer();

                // Register Firebase Singletons
                unityContainer.RegisterSingleton<IFirebaseAuthService, FirebaseAuthService>();
                unityContainer.RegisterSingleton<FirebaseClient, FirebaseClientSingleton>();

                // Register Services
                unityContainer.RegisterType<IMessageService, FirebaseMessageService>();
                unityContainer.RegisterSingleton<IAccountStoreService, AccountStoreService>();

                ServiceLocator.SetLocatorProvider(() => new UnityServiceLocator(unityContainer));
            } catch(Exception ex)
            {
                HandleStartupException(ex, "Error setting up Unity dependency injection");
            }
        }

        private void HandleStartupException(Exception ex, string title)
        {
            // Added as an attempt to capture the exception, but seems to crash before reaching this method
            MainPage = new NavigationPage(new ExceptionView(title, ex));
        }

        private async void CheckAuthAndRedirect()
        {
            try
            {
                var auth = await _firebaseAuthService.GetAuth();
                if (auth == null)
                {
                    MainPage = new NavigationPage(new LoginView());
                }
                else
                {
                    MainPage = new NavigationPage(new MessageView());
                }
            } catch(Exception ex) {
                HandleStartupException(ex, "Error refreshing authentication. Please log in again.");
            }
        }

        protected override void OnStart()
        {
            StartAppStore();
            CheckAuthAndRedirect();
        }

        protected override void OnSleep()
        {
            // Handle when your app sleeps
        }

        protected override void OnResume()
        {
            // Handle when your app resumes
        }
    }

My app has dependencies on firebase-database-dotnet, firebase-authentication-dotnet, Xamarin.Auth (using AccountStore to persist credentials, Microsoft.AppCenter, and Unity. I haven't made any changes in the Android specific project.

Any idea why these crashes might be happening?