Not receiving calendar invitations with street addresses

When I send my wife (or she sends me) a calendar invitation it sometimes is not delivered. For any one invitation it is 100% reproducible. If delete the invite and recreate it, the problem will reoccur 100% of the time. If I alter the invitation, such as deleting the street address in it, it suddenly works (100% of the time). If I alter it back to the original content, it fails again (100% of the time).

I have checked as many settings as I can find and also checked the contacts cards for myself (on my wife's devices) and my wife (on my devices).

The problem is independent of the device itself in use. I see this on iPad, iPhone, Mac, etc. all running the latest version of the OS. I have tried many different combinations of devices, there seems to be no relationship to the device that is used to send/receive the invitation.

We have been seeing this issue for many years now. I also have opened several support cases with Apple but unfortunately so far no resolution.

Note: The accounts are configured to receive invites directly into calendar, not via email delivery. I have not tried email delivery and I would rather have it work with direct to calendar delivery as it otherwise might get overlooked.