Cookies CK does not stop Google Tag Manager cookies

Hi
I have checked that on a website where I was able to reproduce the same as you
if you don't agree, the cookie is not stored
if you agree, the cookie is stored
if you change your mind and you want to refuse the cookie later, its value will be updated so that it expires (this is the way to remove a cookie). BUT, in the browser, it can still be shown. I have noticed an information on Firefox for example :

The cookie XXX has been rejected because it has already expired

This means that the cookie can not be stored anymore

hope it helps
CEd

Ok, thank you for testing it! I suppose it is correct now.