Question ARTrackedObjectManager error when re-using a trackable after disabling / re-enable script

Hello,


I'm getting a weird error in iOS app with AR Foundation and ARKit. I used the same code for ARTrackedImageManager and everything works perfectly.

" Could not find reference object with guid 00000000-0000-0000-000000000000 "
from UnityEngine.XR.ARFoundation.ARTrackableManager'4:Update()

This error occurs when I
1 - scan an object ( a prefab is spawned with 'add' from OnTrackedObjectsChanged)
2 - ARTrackedObjectManager is disable for battery purpose and OnTrackedObjectsChanged is -=
3 - ARTrackedObjectManager is enable and OnTrackedObjectsChanged is +=
4 - if I scan a new object, no error, but for a old object, I get the error just before the 'update' from OnTrackedObjectsChanged...

Where does it come from ?

Thanks !

Using Version 4.1.0-preview.13

 

Hi!
Have you fixed this bug?
How to fix this bug?

 

I`m using v4.17 , it`s not preview version.
but i still have this problem

 

So sorry for not been responding.
Actually, app can crash when you disable ARTrackedObjectManager
Our solution was to not disable this managed... Our app has now some lagging.
No matter the package same problem.
Didn't write a bug report but maybe I going to do it one day sorry :')

 

Unfortunately, it seems like an ARKit bug and only Apple can fix it:
https://github.com/Unity-Technologies/arfoundation-samples/issues/641