No GPS data or same coordinates for all the pictures

Hi everyone,
I’m trying to get some help about a GPS issue with Sequoia+ and Sunshine. Most of the time, there is no GPS data acquired by the sunshine. The DEL stays yellow… Some times the GPS works and I can see it in the status page of the html interface but after taking pictures, all the pictures have the same coordinates (coordinates of the first gps fix). I tried to reset the Sequoia and then update the firmware but the problem is still here, since the the first use of the camera.
Would you have any advice to solve this issue ?
Thank you very much for your help !

Note : I’m not a developper, just a GIS analyst…