Vivoactive 5 doesn't vibrate when calling received

Hello 

I used to have a Venu sq and works well with my iphone during entry calls. Now I have a vivoactive 5 paired the same phone an Iphone SE 2nd generation and just only turns on the screen but it doesn't vibrate when I´m receiving a call. I already turns on the vibrate option in setting and update the watch but still not vibrate.

I notice that with notification as text the vibrate option works. Probably a bug in the software? 

Thank you 

Regards