I have the same issue. It did give me the initiative to try Tapatalk, which I'm posting from now.
I do prefer the Chrome browser on Android.
I find that any threads below the ad I can click on, but not those covered by the ad. Even if I'm zoomed in and can't see the ad, or if I try and click before the ad loads.
It looks like the ad should load to the right of the screen but is loading in the centre instead.
Hope this helps solve the problem.
Hopefully I'm attaching a photo of what the screen looks like properly (again from Tapatalk is still new to me)
Sent from my SM-G930W8 using Tapatalk