In my OP I did. I suggested that it is not the craft doing those maneuvers but in fact that the sensors malfunctioned. Adversarial attacks on tracking systems is a huge. There's an entire field around it, called "stealth". Stealth just means fooling things. Eyes, radar, tracking systems, whatever. I would call these things pretty stealthy.

As to actually meeting your given qualifications and assuming the sensors were right and told EXACTLY what you specify, no I can't. But I can't explain that even when including QM and nuclear tech (or rather what I can even fathom by stretching well into the realms of almost possible). Even things like EM drives or anti-gravity should leave other types of signatures. (Note: I do have a physics degree. I also studied exotic propulsion devices.)

I'm going with Occam's Razor here and guessing at advanced stealth tech or simply the system failing.