by full screen ads do you mean they hijack what you're doing regardless if you were viewing the web browser or not? Cause if that is what you meant, i thought it was era but it was actually an old app I had that updated and added that horrible fucking ad system. Took me a while to figure out which one it was.
If these are coming through our ads that's definitely not supposed to be happening.
Please use the ad reporting thread to help track these down. That thread is regularly monitored by our ad agency. Screenshots and URL, along with browser/device information is helpful. Thanks.