GPS Glitches Plane

Hi

I am getting momentary GPS glitches at varying intervals during my flights, the system is a pixhawk2 with Here2+ RTK during the glitch which only lasts about 1 second the HDop is 100 NSat is 0 and the RX reports GPS lost then immediately GPS found
I could understand it if the sat count was low but it is always around 15 I thought it could be a connection issue but cant see any other errors
Any help would be appreciated

Log https://mega.nz/#!yIljwIBR!34MbJG0d1ivZVS3k0fHPvh1qvWmSraLthIpafJkjw-g

GPS Error.pdf (321.3 KB)