Global link 520 seems to have a very weak bluetooth signal

Hi, I dont know if I got a bad product or if I do something wrong, but need to have The 520 on a very close distans to other products like The smart solar. We talk one meter.

Wien I use the victron connect app I dont havet that problem at all. I reach all The Bluetooth devices without problem.

Another problem is The 520 Will not see the bmv712 at all. Anordning to the manual 712 skall be able to talk via bluetooth.