[Webkit-unassigned] [Bug 270910] New: [model] When launched in QR-Code service: Preview is rendered ignoring prelim scene startUp actions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=270910

            Bug ID: 270910
           Summary: [model] When launched in QR-Code service: Preview is
                    rendered ignoring prelim scene startUp actions
           Product: WebKit
           Version: Safari 17
          Hardware: iPhone / iPad
                OS: iOS 17
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebXR
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pixelpartner at icloud.com

Created attachment 470343

  --> https://bugs.webkit.org/attachment.cgi?id=470343&action=review

The preview render that should not show the explanation panel.

Reported as FB13685722

Since the update to iPadOS 17.4 (21E219), when Safari has the experimental flag <model> Document active, the preview render is made from the first frame, not after optional Actions triggered by Scene Start or done (to i.e. hide prims).

I used the QR-Code service to load this scene:
https://kreativekommunikationskonzepte.de/wp-content/uploads/ar/Gerhard_Schroeder_Teetasse_K3.reality

The blue tinted spoon and the explanation panel should be hidden. So my assumption is that the prelim. Actions have not been processed prior the preview render.

Happend to me with other scenes (also .usdz with prelim schemes) as well.

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