I didn't change anything in the script and the script has always executed without any wait. I don't know how the 1 sec. delay appears for you but the script was never programmed for it. Also, to do it I'll have to redesign the whole script possibly using new ES6 features which will need the latest versions of chrome/firefox or any other browser.
I do want to redesign the whole script since that will allow easier maintenance but it'll just take too much time right now.
fixed in v3.21, hopefully