Fyi:Speak to chat only lowers the volume which I guess isn't a bug
I just talked to support asking this about this since I just got the WF-1000XM6 and lowering the volume is useless and even a problem when you are using it for an audio book or video.
Support said
"Speak-to-Chat is a feature that makes it easier to hear the voice of your conversation partner while wearing the headset. Set up with the "Sound Connect" app.
While Speak-to-Chat mode is activated, the headset lowers the music volume and captures the voice of the other person through the microphone to make listening easier.
In other words it is a normal operation of your unit"
I asked "So it doesn't pause the media? "
They said "Unfortunately ,no"
They also mention " if you want to share your feedback you can go the Sony community in the Sony website an leave your feedback"
So anyone else that wants this please do that. Maybe they will allow us to have it pause in the future.