Creator Julia Vickerman is also known for being a writer/storyboard artist on Clarence and Yo Gabba Gabba!, as well as helping with the animated opening and comic book effects for the movie Super.
Writer Spencer Rothbell is known for being the head writer on Clarence, where he also replaced creator Skyler Page as the showrunner and the voice of the eponymous character.
Invisible Advertising: Netflix did not do particularly good job of advertising the series, with next to no promotion before its debut, and any actual acknowledgement of the series before its release just being Twitter retweets from people who worked on the show.
Keep Circulating the Tapes: The English version of Twelve Forever's pilot was removed from Cartoon Network's YouTube channel following the discovery of Julia Vickerman's pedophilic posts, meaning anyone who wanted to watch it would have to go scrounge around for an illegal reupload.
Old Shame: After Julia Vickerman's pedophilic posts were discovered, Cartoon Network took down the series pilot from their YouTube channel. Strangely, the Latin Spanish dub is still available on its respective CN channel on the same website.
Role-Ending Misdemeanor: Creator Julia Vickerman was fired from the show during its production due to her mistreating her co-workers. She was replaced as showrunner by Shadi Petosky (Danger & Eggs), although Vickerman is still credited as executive producer for much of the series' run. Vickerman continued to promote it on her social media until a long history of pederastic social media posts she had made (including one story on her now-deleted Tumblr about her stalking an adolescent boy) dating back to 2010 came to light, at which point her online presence went quiet and she blocked anyone who brought the scandal up. She eventually made a public apology, claiming she was only joking.
Screwed by the Network: The show just had one bad luck streak after another: Netflix delayed the show's release after its completion, delayed it another month after having given it a set release date, and it also saw minimal advertising. If that wasn't bad enough, the original studio that made it went under and, after its first season, despite getting good reception, it wasn't enough to justify continuing the series at a new studio since it needed to be a hit akin to The Loud House, according to Shadi Petosky.