Thanks for testing/helping out guys.
So on my end I can kind of reproduce? In release (version v0.66.100 and/or 67.107 – more on this later), going to that exact link, I see the ad(s) display for a brief second before disappearing but the page continuously loads (even though the page/gif fully loads/plays). Now, even after resetting data/permissions for the site, I can’t get those ads to display for the life of me.
Further, when testing on Dev and Nightly builds, the page loads (very) quickly and no ads display for any length of time. Digging into this further – @Medjan, were you using 66.100 or 67.107 in the image displayed above?