MSC Editor - ASN1 Value missing field name

Open the attached MSC and try to edit the message parameters. There are two parameters, one of type Seq1 (which is fine) and one of type Seq2.

The second one does not show the name of the second field (f2) of the SEQUENCE:

While it is properly defined in the ASN.1 model:

It makes it impossible to generate a valid MSC syntax.

dv.asnfoo.msc