I think I found what might be the bug:
1. Set the preference to render RAW when possible (rather than just relying on Q toggle as I normally do). It did not start rendering immediately, and toggle via Q still did not work.
2. Quit and restart the app a couple of times.
3. Quit and restart 4.6.9 a couple of times (not that it helped, but I did).
4. All of a sudden it is rendering.
5. Change preference back to JPEG for speed.
6. Now the Q toggle works.
... Apparently I needed to have the full time option on before the toggle would work.