Flight controllers carried out far more examination firings with the capsule’s thrusters subsequent undocking; one failed to ignite. Engineers suspect the greater the thrusters are fired, the hotter they turn into, creating protective seals to swell and obstruct the stream of propellant. Bumper Plates (Iron Plates are technically okay too, https://socialbraintech.com/story3353435/examine-this-report-on-thruster