This last time I was just going through a tag and individually hiding some images on it, viewed an image, and clicked on another tag.
It never actually seemed to do anything when the message shows up, like, for example, take you to a blank page. It’s just shown up like 4 times over the past 2 days. Finally thought I’d ask about it now. And each time I was just doing normal site stuff. Browsing images, sometimes hiding, spoilering, faving.
Although I seem to not be the only one seeing this.
Two other people had this issue when trying to hide a tag.