Funny AI glitch - warp speed AI

So I was doing some VFR flying around the Denver area and after landing I decided to cycle through the AI planes. I came across two Frontier Airlines planes that were circumnavigating the earth at ~31,600 ft about continuously every ~12 seconds. It was a Dash 8-400 and an A319. It was the strangest thing I had ever seen. I was running AI Smooth and Pro Flight Emulator, but I don't know what caused it. Needless to say, their flights were a tad blurry. :-lol