Throwing down more medic bags, ammo crates, or armor kits than your specific skill tree configuration allows triggers an automatic flag. Severe network desynchronization (lag) between the host and client can cause a single deployable to register twice, tripping the detector by mistake.
Because the cheater tag is evaluated locally by the host's game client, on your screen. The game relies on your teammates' clients to flag and display the warning. payday 2 how to know if you have a cheater tag fix