[QA] Scenes | Video screen smart item intermittently fails to render after repeated scene stop/start

[balducciv]

🛠️ Build version:

Decentraland Creator Hub 0.45.0 (fix/bevy branch)

📔 Issue Description:

A video screen smart item can fail to render in the Bevy editor viewport. Originally observed with a video screen carried over from a legacy (Babylon-authored) scene — the gizmo showed but the item itself didn't render, while it displayed correctly in the scene tree and scene preview, and a newly added video screen in the same scene rendered fine. Confirmed by with a broader repro: repeatedly hitting "Stop" on the running scene causes the video screen to intermittently fail to load (~1 in 10 attempts), independent of whether the item is legacy or newly added.

👣 STR:

1. Open a scene containing a video screen smart item
2. Run the scene, then hit "Stop" repeatedly (repeated start/stop cycles)
3. Observe the video screen on some cycles — roughly 1 in 10 — fails to load/render
4. (Original repro) Alternatively, open a scene with a video screen originally authored under Babylon — the video screen fails to render in the Bevy editor viewport (gizmo only), while a newly added video screen in the same scene renders correctly

✔️ Expected Result:

Video screen smart items should render consistently in the Bevy editor viewport regardless of how many times the scene has been stopped/restarted, and regardless of whether the entity predates the Bevy renderer.

❌ Actual Result with evidence:

Video screen intermittently (~10%) fails to load after repeated stop/start cycles. Also fails to render for legacy/Babylon-authored video screens specifically in the editor viewport (originally observed case).
[Screenshot pending — will attach separately]

➗ Reproduction:

⚠️ Intermittent - (~1 in 10 repeated stop/start cycles per Nico's repro; the legacy-scene case was consistently reproducible)

🖥️ Operative system and additional Notes:

Mac M3 Pro. Found incidentally while testing PR #1463 (Bevy editor fixes) — not part of that PR's listed scope. Confirmed reproducible as per this thread; not a release blocker.

New Scene 9 copy.zip