Reversal credit memo

Hi!

Fortype  CR - credit memo in VOFA Negative posting = B. So, when I create acreditinvoiceform (CR), FI document created with indicator "Negative posting".

For reversal credit memo (CRS - reversal credit memo) in VOFA Negative posting = empty. When I create a reversal credit, FI document created with indicator "Negative posting". Why is this happening?

I assumed that FI document for reversal credit memo must created without indicator "Negative posting".

Wheream I wrong? This is a feature or a bug?

Thank you!