Iframe scrolling problem

We are using Google Publisher Tag (GPT) which uses an iframe to display ads. But scrolling is not possble when started from within an iframe so the user cannot scroll when an ad is visible. I cannot get a working solution from the threads discussing similar problems.

I have a codepen that demonstrates this problem, start the drag from the black box and nothing happens.

The comments in https://github.com/driftyco/ionic/issues/1151 are not working in this case as far as I can tell.

< ion-content overflow-scroll=“true” >< /ion-content >