Unable to connect CarPlay with iPhone after update

I’ve recently had problems with apply car play not working or disconnecting straight away. My car a VW Polo is currently in the garage awaiting a part to repair the issue. I’m concerned that this is going to cost me £250. This is something that has happened following some IOS updates and hope that apple will look to sort this in future as it seems a common problem

[Re-Titled by Moderator]