I will continue testing but Im not sure who to "blame" (adress the error)
- It only happening when using AO default CSS optimize.
- Its only happening in Chrome.
- Its only happening with a small change in meta-slider.
- Its only happening in a woocommerce widget. (It acually have affected links on page sometimes so I think its not a woocommerce problem)
4 different sources to dig into. :-)