I was trying to add a team password store (mounted as a sub-store). I do not have a personal or local repository, so i did not add a git remote for the local (root) store. I set the mounted team store's autosync to true:

gopass config --store <team-store> autosync true

But when inserting/changing secrets in the team store, the changes were not automatically pushed to the team remote. I could manually push them using gopass git -s <team-store> push. When I set the root store's autosync to true as well, then the team store automatically pushed to the remote, as expected.

I'm using gopass version 1.6.10