Concentric Surface Pattern Center Line Width Changes

I’m ending up with a wider line which can be seen halfway through the fill from outer edge to the center on this disk when using the Concentric surface pattern on my A1 with a 0.6 nozzle. It also appears that the print head changes direction after this center line. I can’t find anywhere what would be making this happen. The gcode shows the change in line width but again, no idea why.

Additionally, if I slice this on my X1C, everything looks as it should, consistent line width from outer edge to center. Anyone have any ideas as to what would cause this? It’s obvious in the final print and I really prefer this patter to any other, it’s the center section of a wall clock.