Audible and CarPlay

Running into two issues with Audible on CarPlay lately:

1. Sometimes the Audible app will open up to a blank white screen. No Audible buttons, content, or anything. Just a blank white screen.
2. When I can actually get Audible to display on the CarPlay (and I'm not even sure how I've done it), it only shows 4 of my audiobooks—even though I have 20 downloaded books and 110 audiobooks in my entire library. I have no idea why it shows only these 4 (and none of them is the one I've actually been listening to on my iPhone). Even more bizarre is that if I play the title from the phone, it'll show on the CarPlay dashboard as actively playing, even though the Audible CarPlay app doesn't show it in the library.

I have no idea how to fix this, but a Google search shows that other people have been experiencing the same kinds of issues.