Tangent radius doesn't slice/print properly

Guest 8 Months+ 162

Chitubox; Printer: Longer Orange 30


The OD is 44mm, and the lip seen at 36mm should be a tangent radius.  The cross-section, seen here:

is a 4mm line (the flat) tangent to a 4mm radius arc which is then tangent to a 30° angle.  The tangent arc doesn't print, it turns into a 0.5mm step, which is unacceptable, needing post-processing to sand it out and remove it.

Have printed about a dozen examples with them all being the same.

Any suggestions? 


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