Q: iTunes playing albums in reverse order.

Just upgraded to iTunes 12.5.1 on Windows 10.

It's now playing albums in reverse order.

i.e. if I start at track 4, it'll play track 3 next, then 2, then 1.

If I click the "next" arrow it will do the same: 3, 2, 1.

I've tried restarting.

I've tried uninstalling and reinstalling.

I've tried changing the album sort order from ascending to descending and back again.

Is there a solution to this? I can't find anything in the menus, controls or preferences that could be the issue.