Apple Watch Companion App Stopped Working

I’m having problems connecting my Apple Watch to the Companion app so I can use the HRM.

I’ve got a Wahoo Tickr but the HRM chart doesn’t show on Apple Health and Activity, but if I use the Apple Watch HRM through it’s companion app it records everything beautifully.

It worked fine till about a week ago but now the Watch won’t connect, any ideas?

I’m using the phone to route my sensors and Apple Tv.