I cant find the problem, se my photo of the cut piece. Outer arc is straight.

The inner arc is one code:

N36 G3 Y733.31 I-298.14 J285.51 F150

but the outer arc is made with two lines:

G2 X341.25 Y447.8 I-448.37 J-428.86 F150

G2 X169.18 Y18.94 I-620.45 F150