I suspect this may be something in an opParamExprList entry in the CDF. If this doesn't show up on the Edit CDF form, if using an IC61X version, set the CDF type to Base for the component in question, and use the "CDF Dump" button to dump to a file. Or in any version use:
cdfDump("yourLibName" "yourCell.cdf" ?cell "yourCell")
and then post the resulting file ("yourCell.cdf") here.