There is a scene between the bloopers where
Thomas Sanders, while portraying Roman, shows a broken blue crayon and says "Guys, I broke my blue crayon, does anybody have an extra one?" with a sad face. This was a nod to an old fan theory that appeared on Tumblr in 2018. In that year, Sanders' team released a merch poster of Sanders Sides that featured Patton surrounded by crayons. It happened that the blue crayon in the poster, which appears in the background in a little size, was broken in half and some fans pointed out that this was foreshadowing huge angst coming to "break" Patton in some versions of the theory or Logan in other versions of the theory, as Patton is represented with the light blue color and Logan with the indigo blue color. That theory quickly spread out among all of the fandom, known as "The blue crayon theory" and apparently reached the production team who considered giving it a shout-out in the Sanders Sides episode
Learning New Things About Ourselves (2018). The scene was finally not included but it was featured in this bloopers episode. Upon seeing the scene, reactions on Tumblr, where the theory had been born, where notorious.