TTS reads quotation marks aloud (“open quote” / “close quote”) when the sentence is formatted as a blockquote

Description:
In text-based voice playback, quotation marks are sometimes read aloud as “open quote” and “close quote.” This does not happen during real-time voice conversations. The quotation marks should remain visible in the text but should not be verbalized by TTS.

Trigger condition (confirmed by testing multiple messages):
The bug occurs when the quoted text is formatted as a blockquote (rendered with a faint vertical bar on the left in the UI). Quoted sentences in a regular paragraph do not trigger the bug.

Example trigger text:
The original message contains this line as a blockquote:

“Something you created stayed with me.”

(In the chat UI it appears as: [faint vertical bar] + the quoted sentence above.)

Steps to reproduce:

  1. Have ChatGPT generate a response where a quoted sentence is formatted as a blockquote.
  2. Play it back via TTS (text-based voice playback).
  3. The TTS reads “open quote” and “close quote” aloud.
  4. The same quoted sentence in a regular paragraph is read normally.

Note: It seems related to how the blockquote markup is passed to the TTS system, rather than the assistant intentionally reading the marks.