Hipad Max Bluetooth issues

I have a new Hipad Max and it has a big problem using a Bluetooth 4.2 speaker.
The Max can use BT5 and connect to BT 5 headphones but sometimes the signal drops for a second, if I try connecting it to Sony portable speakers which are BT4.2 it connect but there is no sound.
We have tried other tablets which use BT5 and they work perfectly.
Does anyone else have this issue or know how to resolve it?