Pause / resume "say all" with "shift" key


I always thought that pressing the "shift" key allowed you to interrupt the "say all" or to resume it.
Out, I note that if the option "Speech interrupt for typed characters" is not checked, this is not the case.
The speech does not stop.
On the other hand, if the option is checked, the speech is interrupted then resumed fine.
Do you see the same thing?
I couldn't find anything in the user manual about this.
Thank you.

Best regards.


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