Curious question about activity of a fighter jet

Does anyone know what this guy’s doing at all? It was near to where I’ve been working today and I’m just confused why it’s just going back and fourth like that lol.

I think the answer is in the groundspeed shown. It’s not a fighter. Likely either a helicopter or a drone.

Also lots of missing data (dotted lines), I suspect the missing parts are when it went out of that small area due to restricted coverage in the area.