I’ve mentioned the problem, but I think my email address is filtered at Tumblr.
That wouldn’t surprise me.
BTW, you may have noticed whose post I decided to reblog in my example images. That was neither an accident nor a coincidence.
Oh, I guess I forgot to mention that I had disabled all my Safari Extensions before reporting this as a bug (and taking screenshots), just in case they wanted to suggest one of those might be the reason.
Despite the fact that it’s happening on the iPad too.
Not that suggest that Tumblr Support would ever respond irrationally to the presence of a Safari Extension, of course.