I was going through my device storage today and noticed that I had a bunch of videos for some reason. I checked them out, and it turns out that every ad I've watched through Brave Exvius had downloaded itself onto my phone. So I tested a few things, and it turns out that the game downloads the ad to your phone the moment you go to that screen whether you watch the ad or not...

I'm not sure if this is old news, but if it's not, is this happening to everyone? And if it is, is Gumi making sure that it isn't downloading anything malicious?

EDIT: It is apparently downloading the videos even when I'm not going to the ad screen. It doesn't seem to affect everyone, but at least for some people, the game seems to passively download ad videos even if you don't go to the ad screen. It's probably just to make sure that the ads playback seamlessly, but I'm still not sure how secure that is.