Adverts with multiple slides prevents scrolling? Reddit app on android

As you can see in this video which includes touch input, when scrolling along reddit, any time I come across a reddit advert (doesn't happen with regular posts) that have multiple slides/images, the scrolling no longer works and I have to tap around it.

This has been going on for a couple of weeks now, at least. Is it a bug or something Reddit does to kind of force you to acknowledge the ad by interrupting you?