Image Tracking in Vision OS2 beta, no removed event?

When I using Image Tracking in Vision OS2 beta, add an AVPlayer to play one MP4 file when tracking some picture. I Can't get removed event in "for await update in imageInfo.anchorUpdates {" code, so I can't stop or remove the palyer when Image disappear.

Then I used updated event and check "if anchor.isTracked" to remove or add the player again, and It worked.

Now, if I dont move my head, show or hide the picture, It worked like assume. But if the picture dont move, and I move my head away, I cant get updated event, and the player still play even I cant see it. No updated event, and no removed event for me.

Is this a bug?

Image Tracking in Vision OS2 beta, no removed event?
 
 
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