Cannot connect to after installing latest Docker Desktop

Apologies if I shouldn’t be posting here as well as creating an issue. But I’ve just upgraded Docker Desktop from v18 something to v2.2.0.0 and the networking that my docker-compose expects, namely that the containers are accessible on, no longer functions.

I’m currently planning to downgrade to a v18, but was wondering if anyone else has had this issue?

It seems using for actual data transfer (rather than localhost) is unusual, and may no longer be supported?