Seems that with 9.1’s arrival even with TTS/verbal reading of text to ones chat pane overrides a previously existing tab even with voice disabled entirely as shown in the two screenshot links here: https://cdn.discordapp.com/attachments/574951514926481409/866788511914917968/unknown.png & https://cdn.discordapp.com/attachments/574951514926481409/866787627415109642/unknown.png
The new tab’s settings also can’t be reached via a tab at the top of the settings pane. The Text To Speech tab overwrites it. It can still be gotten to by clicking Settings in the dropdown for the new pane, however.