Its history of malfunctions
Source: The National Interest
Like all great inventions, the F-22 has seen some complications during its operation. While only a small collection of complications have occurred (or been reported) the F-22 has suffered a crash and malfunction here and there.
Its first incident, a crash involving a YF-22, occurred at Edwards AFB during a test run. The second most notable malfunction happened in 2004 at Nellis AFB in Nevada, where a pilot emergency ejected himself after the engine shut-down during take-off. The shutdown was the result of a flight system malfunction that was later restored and updated in modified versions of the aircraft.