Which way do I go...

flightaware.com/live/flight/UAL943

A closer look if you pull up

flightaware.com/live/airport/KLAN and see numerous east/west moves it’s been making…

Any ideas?

Based on a cursory inspection, I would chalk it up it to interference from canadian radar data.

Gotcha - after looking at the times on the tracklog I realized it wasn’t realistic. Just got a little curious after noticing zigzags all over my Lansing map!