Not absolutely sure this is a bug, but many times I have been playing lockdown as a recon, and while I was invisible - I hadn't even appeared yet and often hadn't even recon-marked someone - some players always manage to immediately dash up to my EXACT POSITION, blow my recon cloak, and kill me in about 10 seconds tops. Since I highly doubt that anyone playing lockdown uses the force (snicker), this means that there is either a bug that makes recons visible to some players, or that some players are using cheat programs or hacks to spot recons. Either way, the issue must be ammended! A recon cannot be a recon if someone can see him clearly!
Oh you think? They can see your footsteps.
http://forums.spiralknights.com/en/node/70027