Intermittent "No audio was received" errors with valid requests

Description

• Hi, I am experiencing intermittent failures when using edge-tts (via edge-tts).
• The issue started recently (last 1–2 days). Previously, the same code worked fine.
• Now many requests fail with:
• No audio was received. Please verify that your parameters are correct.

Environment

• OS: Windows 10
• Python: 3.10+
• edge-tts: latest
• Voice: vi-VN-HoaiMyNeural
• Concurrency: 1
• Timeout: 300s

Behavior

• Requests randomly succeed or fail
• Some requests take 90–150s, others ~2s
• Failures often occur after retries

Example:

• attempt 1/3 failed after ~3s
• attempt 2/3 failed after ~4s
• attempt 3/3 failed after ~3s
• No audio was received