Strange Unidentified Plane With Odd Flight Pattern … 0826/2228Z

This plane has no id and has the strangest flights every day. Sometimes it lands at one airport and randomly takes off from an airport in another country. Does anyone have an idea as to what this is?

Bad data. Garbage In Garbage Out.

IIRC there is a particular common way of misprogramming some models of transponder so that it ends up sending an ident of just “N” (this is something like trying to use the US ICAO/tail number translation on a non-US aircraft)