Notifications vibrate during call...

Hey all. Quick question...When I'm on a call, and a notification comes through, it vibrates. This is quite annoying. I can feel it, and the person on the other end can hear my phone vibrating. It has to be new, because I dont remember it happening. Maybe I changed a setting? Or maybe it's been happening since Nougat? Is there a way to turn off vibration for notifications while i'm on a call?

Thanks