Calendar events from iPhone don’t sync to Mac after Tahoe update

Since the Tahoe update, Calendar-event syncing through iCloud appears to be broken. I created an appointment on my phone, and several hours later the alert went off on my phone but not my Mac. I checked the calendar on my Mac, and found the appointment was never synced.

I then created a new appointment on the computer, and it immediately retrieved the original one I had added from the phone. This is repeatable behavior.

I then created another appointment on the phone and checked my calendar at iCloud.com. The appointment was there. So the problem is the Mac. And yes, it is logged into the same iCloud account and has calendar syncing on. It has been working fine for years, until the Tahoe update.

This is a fundamental application that must work correctly, Apple. Come on.

[Re-Titled by Moderator]

Original Title: Anyone notice that calendar events created on your phone don't sync to your Mac anymore?