If it's snapshots causing issues that clearing .m2 is fixing, try adding `-U` to your mvn execution instead, that forces snapshots to be updated.

Do you run `mvn install` for your local project under development, or any of its locally built dependent modules? Are all of those at a snapshot version? If not, I think you'd need to delete it from .m2 (or clear all of .m2) to get updates to it into .m2, since even for the local cache I don't think maven will override a cached version during install.