[NTG-context] temporarily disabling enumeration numbering

Hello again, Section 10.3 of the manual says that one can disable numbering for one item of an enumeration by putting [-]. However, this seems to affect the following item instead of the current one. For example, \defineenumeration[MyEnum][location=left] \starttext \MyEnum First\par \MyEnum[-] Second\par \MyEnum Third\par \MyEnum Fourth\par \stoptext removes the number of the third line, instead of the second one. Vianney