My P4P+ was working fine. Went on vacation from Kansas to Hawaii took it with me in its Pelican case batteries in my carry on. Took it out to fly and it wouldn't hold still. It would fly up then drop and fly away. I landed did the compass and IMU still the same results so I just packed it up since I didnt want it to fly away. Got home and same symptoms. I had updated firmware on controller and drone before leaving. Never had this problem before and been flying for about 2 years. Any ideas? Thanks!