Reminders in macOS Sonoma 14.1.1 is slow

Reminders is syncing between my Mac, iPhone and iPad using iCloud, and on the Mac it is crazy slow. On launch it might take a minute before it shows current state, whereas phone and tablet are immediate. Updating status of a reminder (toggle doneness) makes it think a long time, changing view between Today, Scheduled, All, etc., causes long pause, etc. Something seems broken. If it was possible I'd remove and reinstall it, but I don't think it is. I've turned off then back on iCloud to get a fresh sync, which doesn't make a difference afterwards. Any advice is appreciated. I have 125 reminders, which seems like a small amount re syncing.

Apple M1 Max, running Sonoma 14.1.1.