phone dialpad stopped speaking on Galaxy S6. what did I do?

I've had my Galaxy S6 for about a year now, and I'm sure the numpad used to speak. When I open the phone app, and press open numpad, I get no numbers spoken until I've removed my finger. This happens with talkback and Vo9ice Assistant. Solving this would earn my eternal gratitude. I've factory reset the phone, but to no avail.