On vacation in the mountains of Colorado. I did the compass calibration, and took off after normal green lights. Just went straight up about 15 feet to check things out. It hovered ok for about 30 seconds then came straight down in a hurry. Am I hitting an altitude limit? I calibrated and took off at 11,000 feet. I'd love to get some panning mountain views, but don't dare fly away until I get this figured out. Suggestions? I'm using FPV Booster as my app. Had 10 satellites.