Here + Problem during flight

[Loris_Demetriades]

Can anybody help me please with this issue?
I have the Here+ on the quad running 4.0.2. on a Cube Black.
After about 20 minutes of flights and with RTK base Fixed position Here+ lost all sattelites and also the compass not functioning.
Link to the folder with the logs:

GPS LOST FLIGHT

[Mallikarjun_SE]

Had similar issue on Here2. I always use dual GPS just for back up! Yours might be cable/power issue too! Check cables once.

Loss of all satellites on HERE 2 GNSS in-flight

Can is last to detect, so if you want it to show up, you need to use the compass mask to only detect the exact types of compass that you want. So ignore lsm303d and mpu9250

[Loris_Demetriades]

I solve this problem and it was power supply to the Here+. First i replaced the Here+ with a Here V2 and everything was ok. So i thought maybe firmware reflash for the Here+. I did so and again the same issues. I noticed that if i was connecting the usb to Cube, the issues with the GNSS were gone away, so i thought is power supply problem. On serial 2 i have a Drotag for pictures geo tagging and camera triggering. I gave 5+ from the servo rail to the Drotag and that was it. Problem solved. So Here V2 has different power needs than the Here+ or maybe a ground loop?