Autoplay blocker not working reliably

I have, as far as I can tell, turned on all the options to block media autoplay. There is always a possibility I overlooked a hidden option. Autoplay blocker works properly when I open a Youtube link in a new tab, the video does not start to play, and when I switch to this tab it still does not start to play. It only plays the video after I click on the play button. Perfect. However, when I click on a Youtube video link and open it in the current tab, it always starts playing automatically, without waiting for me to click the play button. I would prefer it to wait until I click on the play button. I never want any media to start playing unless I explicitly start it myself.