I started having the pop up issue after I updated my iOS on my iPhone. When I went back into settings I noticed the option to block pop ups had been turned off. I turned it back on and it has been fine since.
In Chrome on iPad, i'm also getting nasty redirects to an obnoxious Home Depot full screen ad which I can't seem to block in anyway. Not sure what's happened to the forum code but somethings certainly changed.