I Have 2 Orion TR smart non isolated 12/12-30. Installed on a catamaran for one year. Each is on an independent start battery with independent alternator. Recently they will charge regardless of remote switch position. Even with the green remote plug removed both units will charge if the input voltage meets the engine running threshold. This seems to have begun after a firmware update. Currently firmware v1.06. I have removed and reapplied power and still the same. Any ideas? Why both?