I am building a Tag Manager plugin for WordPress. The plugin has its own cookie notice which loads tracking scripts only after visitors agree to cookies. Unfortunately, today I noticed that when Opera's ad-blocker is running, scripts that should wait for the consent don't do this and are loaded with the pageload.
Visit the website of my plugin fullpictureplugin.com from opera with ad-blocker enabled and disabled. You will see that when it is disabled a live chat bubble pops up in the corner. The script of this chat doesn't load until the visitor agrees to all cookies or personalisation cookies.
This is very odd and I haven't seen anything like it before.