Hey Jim! Thanks for the quick reply.
I spent some time last night uninstalling, reinstalling, reconnecting to the library and patiently hitting "wait" every 30 seconds until it eventually seemed to fully load. All on Wi-Fi this time.
It's a big-ish library of about 26,000 songs, all with cover art, lyrics, etc. I exported the library XML to gauge the size and it's 220MB. Album art would be pretty massive. Not sure how that translates to the several-minute load time for the library though, especially on multi-gig Wi-Fi. That progress bar would help.
Now that I have an accessible library again, I'll give AAuto another shot tonight and get a screenshot of what I see vs. what I should see. Unlike MO4Media, which I've been running for a long time, I don't know how JR4A might display my library on the pre-Coolwalk version of AAuto. With this polar vortex I haven't been in a big hurry to hop in the car these past few days!
Cheers,
-Doug
EDIT: I made the mistake of switching to local library and now it's freezing indefinitely trying to get back to the remote library. Looks like I'm back to square one. Luckily AAuto has since decided to play nicely with MO4Media again (I'll put my suggested fix in the other thread.)
All the same I look forward to seeing how the app develops!