PETG HF Under extrusion?

Using Bambu’s High flow PETG, everything prints great besides the area pictured below. I tried slowing the print down by lowering the volumetric flow but it didn’t seem to have any effect. Any suggestions on what to adjust? I have had the same issue with regular PETG as well. Thanks!

If you have made this many times it could just be a g-code error not under extrusion

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