How to reproduce:
1. Open the attached project ("ARAssetBundleLoad.zip")
2. Open the "Prefabs/SampleScene" scene
3. Enter the Play mode
4. In the Hierarchy, select "ImageTarget" game object
5. In the Inspector, enable/disable the "ImageTarget" several times until the "Assertion failed on exception..." message appears in the Console
-- Editor crash

Reproducible with - 2018.2.0a1, 2018.2.20f1, 2018.3.1f1, 2019.1.0a12

Notes:
- Could not test on 2017.4 due to Console "The type or namespace name `VuforiaMonoBehaviour' could not be found." error.
- Before the crash, an error message appears in the Console "Assertion failed on expression: 'domain != rootDomain'".

Stack trace:
(KERNELBASE) RaiseException
(mono) [c:\buildslave\mono\build\eglib\src\goutput.c:201] g_logv
(mono) [c:\buildslave\mono\build\eglib\src\goutput.c:211] g_log
(mono) [c:\buildslave\mono\build\mono\metadata\threads.c:1061] mono_unity_thread_fast_attach
(Unity) ScopedThreadAttach::ScopedThreadAttach
(Unity) UnityWebRequestProto<UnityWebRequestTransport,AtomicRefCounter,RedirectHelper,ResponseHelper,DownloadHandler,UploadHandler,CertificateHandler,HeaderHelper,AsyncOperation>::Job_RedirectTo_BackgroundThread
(Unity) JobQueue::Exec
(Unity) JobQueue::Steal
(Unity) JobQueue::ExecuteJobFromQueue
(Unity) JobQueue::ProcessJobs
(Unity) JobQueue::WorkLoop
(Unity) Thread::RunThreadWrapper
(KERNEL32) BaseThreadInitThunk
(ntdll) RtlUserThreadStart