Why is the Apple Watch app's pace so delayed ?

Hello,

I have been using Runna for couple of weeks and I am really loving it! However, when using the apple watch app I notice that the pace is delayed by at least 10 seconds, this is fine on longer runs but when doing 400m intervals or other things like this, it feels like it takes forever to get the actual pace you're going at. So this is quite frustrating when trying to adjust your pace

I am starting the run in the AW App and I have my phone with me.

Is anyone else noticing this?