One Overwatch player has discovered that the cleaning robots on Horizon Lunar Colony don't actually clean anything.
The Roomba-like robots are found in the attacking spawn of Horizon, and happily move around the ground until a player disturbs them somehow.
It was believed these robots were keeping the moon base clean, until Reddit user JuanDaOne1 recorded evidence that shows them unable to remove a spray from the ground.
JuanDaOne1 jokingly claimed in his post that this made the game unplayable for him, but other users defended the little robot, claiming he was doing the best job he could.
Others pointed out the robots could be vacuums instead of steam-cleaners, and therefore not suited to take spray paint off of a surface.
In the post, JuanDaOne1 said he would be happy to see Blizzard fix the issue, and reminded other users that no robots got hurt during the making of the clip because Overwatch is a video game.
With changes to Brigitte and Doomfist coming in the next patch, it's obvious Blizzard is listening to the community, but a hotfix to a spawn room cosmetic might not be on the top of the priority list.