Apple Maps can't find my home address when accessed form my contact card

If I search for my home address in maps by door number, street, town and postcode it locates it correctly and accurately.

However, when I save that address as my 'home' (updating my contact card in the process) and then try to access the location using this favourite it brings up a totally different location, when i expand the pin that is labelled as my 'home' I can also see that its now a totally different address?

I have tried re-enetering m address in my contact card in different formats but this just results in apple maps providing different locations when I try to access my location from the 'home' favourite.

Its annoying as i regular use the home favourite when navigating return car journeys using apple maps. I also have a 'take me home' shortcut which no longer works for the same reason.

I have the same issue when using maps on my MacBook.

When I try saving friends/family address as favourites, or accessing their address locations using the map icon in the contact card I don't have problem

Any help would be much appreciated.