They can say what they want about the add-on “simply being a pass through”, but I have documented evidence that it breaks the autopilot in the V35B.
You can even ditch the add-on and edit the aircraft’s panel.cfg file to have it load the WT GNS by default and it will also break the autopilot.
There is a clear relationship between the two on some aircraft.
I understand there is a ton of conflicting and confusing information on the issue and which one to uninstall, etc., but the issue is real and is easily replicated.
I’m not saying that your issue on your OP is due to the add-on, I was just curious if you’d tested it with it installed and not installed. I’d test it on the C207, since it’s using the Asobo GNS by default, but I don’t have the C207.
The fact that you mention the 172, however, seems to indicate the issue isn’t related to the add-on, since that aircraft has the WT GNS implemented by default.