By Rob Lenihan Roblox’s shares are down 71% since January. The desperate cry came booming out of the heart of social media. “ROBLOX UR STOCK IS DIVING INTO THE MULTIVERSE OF DOCTOR STRANGE,” the commenter tweeted, referring to the recent Marvel film. “THIS ISNT HELPING.” That might sound a little harsh, but Roblox Corp. (RBLX) – Get Roblox Corp. Class A Report, a video game developer, has been hit with some bad mojo in the last few months. ‘The Foreseeable Future’Founded by David Baszucki and the late Erik Casse, Roblox finished down nearly 11% to $30 on June 3, a far, far cry from its all-tim…