Having big issues with these headphones and audio stutter and drop outs when connected to my mac.

The thing is, when I turn off my apple mouse they are fine so I'm guessing there's bluetooth interference or something. 

It's pretty disappointing because I have a pair of £30 BT headphones that don't suffer from this problem and in general seem to have a more stable connection all round.

Any ideas on what I could try? I've tried resetting my mac Bluetooth and reconnecting etc

Considering returning and getting the WH1000MX3 as I can imagine they have a better connection, being bigger.

Also not blown away with the WF noise cancellation.. or am I doing something wrong??