Abnormal Member UC on Cone Segment

DOCX

I have run a topside in-place analysis using ISO code and the result of the analysis showed that the topside leg, especially on cone segment having UC>1.00. Based on the member review, i found out that the member actual stresses were less than allowable stresses in member details, but the UC generated is more than one. is it a bug? or SACS is not capable to design the cone section using ISO code? Appreciate if one can advice on it. Thanks.