Hi @SteveTaylor6 - with the convergence of Explorer and Collector into Field Maps, we did not want to change the default behavior expected for either app. So if you open a map that is read-only, it should open to the default extent that you authored the map to.
If you open a map that you can edit, it should open to your current GPS location so that it establishes the GPS connection (especially for external receivers) before you start collection.
Opinions vary on the most effective method for opening the map. We'd like feedback on this moving forward. Please share your thoughts!