Watch overtake Bluetooth connection when two (2) Bluetooth device is connected like a headphone. Default Audio

I usually connect my Venu 3 watch and earbud for gym workout yet whenever I get a call from any messaging app like Google phone, messenger or even watching YouTube, it priority the watch but no audio comes out. 

In the phone app, you don't see the earbud in Bluetooth, only the watch. You need to disable call in the phone Bluetooth setting then activate the headphone. Or why didn't it play on watch speaker. This is really counter intuitive. It should be smart enough to know there's a Bluetooth headset priority then we can change to watch speaker of needed...

I hope it's not the same issue with android auto when calls pass to watch and muted instead of call Bluetooth. Where can we change all these settings? 

Plus, when you're not in the phone app, the watch keep vibrating and notifying continuously that it's ongoing call! Like, yes, we know! Stop vibrating and notifying me non stop!