i was using IE edge – as i was keeping the work separate to my chrome work but switched it to FF – no problems after that
as for the input variable count, after reading your link, i would say it is the default one but not had any issues with it on other projects
i think it might be an IE edge issue (yeah i know) just used that to keep cookies etc separate from other browser so could flush them without losing the tabs in chrome for other work
end solution – use FF no issues!