Also the frequency with which they appear, and the number of iterations required to pass appears to have a strong inverse correlation with whether you're signe

Also the frequency with which they appear, and the number of iterations required to pass appears to have a strong inverse correlation with whether you're signed into Google with Chrome or not (we use a wide range of browsers for testing, all of which get reset to baseline). In other words, it's much easier to just use Chrome and stay signed into Google.