Hi there,
I’m having the exact same problems (or even more) when using OB with Reason. I’ve got an AR with OB that worked perfectly in Reason 9.5 until I’ve got the AH with the intention to use it also as a VST effect through OB, so I can apply it in different instruments in Reason as I deem fit. Seemed like a a good idea, but OB with AH is highly unstable: I’ve got a significant latency + digital noise and, when using it as insert effect, I’ve got dry signal + wet (double sound). I’ve followed the manual, got the latest update, try diferent buffer size, try even using the AR and/or the AH as external sound processor (aggregate device with my Zoom24) and plug directly both AR and AH without any HUB directly into my iMac (late 2014) with Sierra.
Thing is for me the fact you can use AH as insert effect in Reason was the trigger to decide to purchase it. Am I missing something? Do I need the (expensive) Overbridge USB Hub even when I’m plugin directly the device without any USB hub?