Is LGBTQ+ material being blocked because it's LGBTQ+, or is just that some of it is also being considered NSFW?
I don't know how one would identify content as LGBTQ+...or as heteronormative, either...without there being some element of sexuality in it. In other words, if all anybody is doing is fighting monsters and taking their stuff, what would identify it as LGBTQ+? So I wouldn't be surprised if a high percentage of LGBTQ+ content gets flagged as NSFW, compared to a random sampling of content.
However, I also wouldn't be surprised if the sort of people who go out of their way to flag NSFW content have different reactions to the same activity depending upon whether or not it's heteronormative.