Chase Buddy Star Not Being Counted in Playground

My star total is currently 303, 302 from the main levels and 1 more from the current Klei Tournament mission. The only star I still needed was from the Chase Buddy mission in the Playground level. After completing the mission, a star was added under Chase Buddy in the pause menu, but the top bar that displays after completing a mission shows that I am still missing 1 star from Playground. Restarting the game did not fix this, nor did completing the level multiple times.