GPS externe reception KO

Hello

I used to connect my Ipad A1566 with an external gps receiver via bluetooth iphone via wifi to get my position reference on the ipad. Since the last update it does not work any more : unstabilized position and message “waiting for location data. this model of Ipad has no internal GPS receiver” which is true but not new. As if the position signal from an external souce was now not recognized. I see the connexion with iphone in the right upon corner though.

what is it about here?

thanks