Sorry David, I worded my question badly: I meant, can Google Page Speed Insights return false negatives if you run it too many times in a row, like you said can happen with the Mobile Friendly test?
And does false negative in this case mean a) it’s likely to tell you there’s a problem when things are actually fine… or b) it’s likely to say things are fine when there’s actually a problem?
If you see what I mean?