Whisper web demo not working on IOS

[xuwenguang]

System Info

IOS safari

Transformer.js 2.7

Environment/Platform

• Website/web-app
• Browser extension
• Server-side (e.g., Node.js, Deno, Bun)
• Desktop app (e.g., Electron)
• Other (e.g., VSCode extension)

Description

Whisper web demo here is not working for ios safari.
https://huggingface.co/spaces/Xenova/whisper-web

It stucked after loading the model.
Here is the console log captured from iphone:

[Error] Error while parsing the 'sandbox' attribute: 'allow-downloads' is an invalid sandbox flag. (whisper-web, line 225)
[Info] Successfully preconnected to https://fonts.gstatic.com/
[Error] Failed to load resource: the server responded with a status of 406 () (sse, line 0)
[Error] Failed to fetch Space status via SSE: – "Failed to initialize stream (code 406)"
	onStateChange (SpaceHeader-BJTNEU2I.js:51:6726)
	onerror (index.js:9:2862)
	(anonymous function) (index.js:9:1545)
[Error] SSE Stream ended with error: – Error: Failed to initialize stream (code 406)
Error: Failed to initialize stream (code 406)
	error
[Error] Unhandled Promise Rejection: Error: Unsupported model type: whisper
	(anonymous function) (worker-8c8208dc.js:1790:179608)
[Error] Cache API operation failed: Quota exceeded
[Warning] Unable to add response to browser cache: QuotaExceededError: Quota exceeded. (worker-8c8208dc.js, line 1790)

Reproduction

open the demo site: https://huggingface.co/spaces/Xenova/whisper-web
choose whisper-base.en model
choose audio from the default url, click on transcribe button

[xuwenguang]

it fails when trying to load model from pipeline.

[xuwenguang]

@xenova please help to investigate.
Is this related with the JS engine in IOS causing the automatic pipeline and models having different behavior than chrome running in v8?