Machines observed with radar verification that have performance far beyond that possessed by any nation on Earth is hardly absurd. It just is.
Not when the radar are simply showing artifacts that arent real, but rather a result of software issues, calibration, stray voltage or surges or grounding, etc etc. Happens all the time with electronics equipment (especially when its in a high stress, high G environment. The most experienced aviator cant diagnose it properly unless he/she also happens to be an expert on the electronics involved, which isnt the case.