This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
Those 3 or 4 times may have been after Google had updated their anti-adblocking stuff and before uBlock Origin had updated their anti-anti-adblocking stuff.
Also, do you have any other adblockers installed? Does your browser have its own adblocker? Either of those can cause interference with stuff like this.
Nope, I use Librewolf with uBlock Origin, uMatrix and BitWarden. Nothing else.
But yes, I haven’t seen it in quite some time now.