Purchased a used 3810R without remote, claimed to be broken, took a chance anyways? Works great with remote I have, including the headphones jack via remote. First I knew this was possible, haven't seen it mentioned anywhere. The first remote I paired was one of the newer remotes w/tv volume control, but I also paired an original roku 3 remote and its headphones work as well. I still have two other 3600 Roku sticks, and they don't work with the headphones like 3810 does.Was this known previously?