New to Mooney ownership here. Have flown about 25 hours the past month to get current and the last two flights began to get a 'loss of integrity' message on the Garmin 430. The message is intermittent and came on approximately 5-7 times over two two hour flights (one was IPC). The system returned to normal each time. General flying location was in the Maryland area in a triangle bounded by Hagerstown, MD, Gaithersburg, MD, and York, PA. No issues observed on unit startup. I am using a homemade Stratux ADS-B In while flying. I see very little information on the web regarding this and no 'troubleshooting' in the original Garmin 430 manual that came with the AC. No other known EMI generated on the AC. Mobile phone is turned off. iPad mini is on for ADS-B in and Foreflight - no SIM card. Thanks.