Problems with Editing a Shared iCloud Calendar

A follow-up on this.

The issue seems related to using iCloud for Windows and Outlook for Windows, like I do at work on my work computer to use/see my iCloud/shared calendar items from my work computer.

The patterns that I observed:

The shared events that my wife was unable to edit from her iPhone where marked as "Private" (sensitivity field) in Outlook. After I switched the sensitivity of calendar items to "Normal" in Outlook on my work computer, my wife was able to edit those items on her iPhone.

The markings of "Private" on events from Outlook/iCloud for window has no effect on the ability to edit those events from the shared account on iCloud from a browser - that only precludes the ability to edit them from the shared account from an iPhone.

My wife can add events to the shared calendar. She cannot edit scheduled events that she adds or events that I add.

I can edit events that either I add or that she adds.

I am sure that I am sharing my iCloud calendar - the shared calendar name is listed under the ICLOUD heading in the Calendars list. I invited her to join that shared calendar via the email address associated with her iCloud account. SHARED WITH lists her as Accepted and View & Edit.

Thank you for all your attention to this.

She is able to edit the shared events via a web browser on a computer. She cannot edit those same events from her iPhone.

Nobody else is attempting to edit those shared calendar events at the same time.