Contents in MacOS Imports My Card from non-primary Account

There appears to be a bug in the handling of 'My Card' in Contacts on MacOS. It is certainly the case that there is inconsistency between the behaviour on MacOS and iOS.

My wife and I each have our own Apple IDs. On her devices her ID is primary and she imports my contacts as a secondary account. On my devices my ID is primary and I import her contact as a secondary account.

On iOS My Card is me.

On MacOS My Card is my wife.

It seems to me highly likely that the following is happening:

1) On iOS My Card is either set up through a different mechanism or is only searched for in primarry iCloud account.

2) On MacOS all contacts are searched with the first one found being used as My Card. As my last name starts with an M, and my wife's starts with a B, her card is found first.

I believe that the correct behaviour is that exhibited by iOS.

If I look in Contacts it shows me both My Card entries at the top of the contacts list. If I use Card->Go To My Card it takes me to my wife's card. Autofill on MacOS often offers me only options from my wife's card. The only way I have found to make my contact info primary on MacOS is to disable importing Contacts from my wife's account.

It would be great if My Card always looked only at the primary iCloud account (and I have not yet come up with a scenario in which this would not be the expected behaviour, are there any?)

Thanks!

daniel