Apple Podcasts Sync Library Inconsistent Behaviour
TL;DR - some (but not all) of my podcast shows are out of sync on my Mac compared to my iPhone and iPad.
I have selected "Sync Library" for the Apple Podcasts app on my iPhone 12 (iOS 17.5.1), iPad (7th Gen, iOS 17.5.1) and MacBook Air (Early 2015, macOS Monterey 12.7.6).
For some podcast shows, the status is perfectly in sync between the 3 devices in terms of played/unplayed episodes and how many minutes are left on a podcast being listened to.
But for other podcast shows, the MacBook is completely out of sync. For example one podcast show (correctly) says on both my iPhone and iPad that there are no unplayed episodes. On my Mac, the same podcast show has 95 unplayed episodes, dating back more than 18 months.
Of the 20 podcast shows in my library, 6 are out of sync on my Mac, with the other 14 being in sync between all 3 devices.
Any ideas what's happening and how I can fix it?
MacBook Air 13″, macOS 12.7