Stutter after admob advert displays...

Hi - I am having an issue where after an ad displays from admob, I then call to get a new ad, and when that ad data returns there is a significant stutter in my gameplay.

This is the admob plugin in test mode. The stutter seems to happen when the load ad request returns as I print out something when this happens and it seems to coincide.

I tried removing the ads altogether and then I have no stutter.

Is this something everyone sees? how do people handle this? Is this just me? Anything I should look into?