The ads shouldn't be affecting how the page loads. The way I have it coded is that the Sylestia page loads first and then through javascript, the ad is then loaded after the page is built.

That said, I, too, have the same occurrence where sometimes the ad just doesn't load and the space is blank. Other times it gets stuck loading (tab icon shows the loading icon) forever. However, I can still navigate the page just fine since the two are supposed to be separate.

But I guess it's possible that other browsers or devices handle it other than how it's supposed to be handled.

I could manually give your account ad exception for 30 days and then you can let me know if you experience any issues during that period and then if the issues come back after it expires?