Hi @SaferHarbors,
That issue link is from when ArduSub was being developed by Blue Robotics as an unofficial fork of the ArduPilot repo. It has since been merged into the mainstream ArduPilot project, and the old issues were transferred over as well. In this case the link to the transferred issue is here - it seems it has still not been addressed.
I can bump it with our main ArduSub developer if it’s affecting something you’re trying to do, but can’t guarantee we’ll be able to spend time on it.