Final Cut: No Audio in 2x Playback?

Hey! I save a lot of editing time by playing my timeline at 2x speed (tapping L twice), but all of a sudden, my timeline no longer plays audio at 2x. WHAT!? How do I get my 2x audio back!?

Things to note:

• I've already tried closing and re-opening the library, the application, other applications, and I restarted my computer to no avail.
• I tried removing titles and checked all the audio roles.
• It doesn't work in Optimized or Proxy.
• I've turned audio skimming off and on again—that doesn't do it.
• The audio does playback in double-time in the event browser, but in the timeline, I only get a little blip at the beginning of each new edit. That's it.
• Other projects and libraries are having the same issue.
• I don't know the cause. It literally JUST stopped. I can't seem to find a feature or option to toggle this on/off. Please help!