So technically , the farther away you get from the CG, the more "Gs" will affect the attitude, although it shouldn't be unusable. Just a bit more movement. But just the same, if you give our tech support staff a call, they can explain how to send us a debug datalog so that you can show us what you're seeing. Note that the datalog only stores an hour or so of system data, so you'll want to pull it directly after a flight when you've experienced what you've discussed here.