Baro Glitch - Help!

I had a weird issue yesterday when flying my f450 with pixhawk. All was flying perfect, except for if I did a coordinated bank turn. I would hear a couple of beeps and the copter would drop around 3 feet then recover. It happened over and over and only when doing banked turns. I looked at the log files and see the baro error every time: BARO GLITCH ERROR: Baro glitch. Any thoughts on why this would happen, especially when I am bank turning? I cannot figure out how to compress the dataflash file enough to attach it.

Thanks!