Script dissapearing

Hi!

I am setting up the cookies for a site with this plugin that I discovered recently, and I am quite confused. I understand that I have to put the code on the Header scripts field on the corresponding Cookie category. I do so, I save. But if I go to edit again the category… the script is not there!

Also, I undestand that those scripts get included later when the visitors accept the cookies (that is the thing) and this seems to happen, I checked on the code inspection, and on the google tag manager chrome extenion for example, but analytics still doesn’t register any data…