We've been trying to prep and fly 3 pairs of Xbees on 3 rc planes for the past week. We've had repeated issues with the Xbees all the time. Sometimes it would connect and work great. On other days it would disconnect. No issues with the boards as we can swap to a different one. This weekend, one of our perfectly fine working Xbee pairs just stopped working when we went out to fly. And another pa…