To reproduce:
1. Install attached .apk to your Oculus GO and launch it
2. While in app, press Back button to initialize Platform SDK
3. Click touchpad trigger to quit application (Application.Quit())
4. Launch the application again
5. Click touchpad trigger again to quit application (Application.Quit())

Actual results: application crashes/freezes

Reproduced in: 2018.3.0b4, 2018.3.3f1, 2019.1.0a14

Note1: earlier releases produce broken scene objects, therefore could not be tested
Note2: 2019.2.0a1 produces console error when building:

"FormatException: Input string was not in a correct format.
System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) (at <1aa022ba59ae4cfa86ec80b69d3d4fc2>:0)
System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) (at <1aa022ba59ae4cfa86ec80b69d3d4fc2>:0)
System.Int32.Parse (System.String s, System.IFormatProvider provider) (at <1aa022ba59ae4cfa86ec80b69d3d4fc2>:0)
System.Convert.ToInt32 (System.String value) (at <1aa022ba59ae4cfa86ec80b69d3d4fc2>:0)
UnityEditor.Android.SDKManager.ParseSDKManagerOutput (System.String[] packageList) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.SDKManager.UpdatePackagesList () (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.SDKManager.HighestVersionInstalled (UnityEditor.Android.SDKManager+Component tool) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKToolsDetector.GetVersion () (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector.Detect (System.Version minVersion, UnityEditor.Android.PostProcessor.ProgressHandler onProgress) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.EnsureSDKComponentVersion (System.Version minVersion, UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK+SDKComponentDetector detector) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.PostProcessor.Tasks.CheckAndroidSDK.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.PostProcessAndroidPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.Android.AndroidBuildPostprocessor.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at <1b1a61ffd3924442960b571323440781>:0)
UnityEditor.PostprocessBuildPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:106)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
"