Not tracking page exits

Hi Daan,

Great plugin, I will endeavor to keep using it however I have an issue right now:
GA is not tracking exits very accurately. For example, I will exit the page and the analytics might not recognize this for 5-10mins after the fact.

Background info:
Using Swift Performance Lite – no CSS or JS merge
Allow tracking (always)
Snippet type (default)
Position tracking (header)

I do also have FB pixel placed in the theme header elsewhere
I tried to move the GA position to footer but unfortunately it was then showing x10 visits for myself in GA.

Anyway, hopefully you can help. Thanks!