That’s a Premier with the scale flanges….that locomotive has the 2-3 feature……it may not like that particular brand of track…..check your track for evenness, making sure there’s no odd transitions…..be sure the truck pivots and articulates as it should. Check gauging vs. track. You may have to find a happy medium to keep the wheels locked between the rails…..I never had much luck with the 2-3 feature on my layout as well,…
Pat