[GNC] Imbalance bug in credit note generation?

[Amish]

Hello

I am trying to create a credit note for a customer, in exact same way as 
Invoice except that type chosen is "Credit note".

But after posting the "credit note", Gnucash is "increasing" receivables 
instead of decreasing.

It also increases "tax liability" - it should actually decrease it.

But it correctly "reduces" the Income.

Effectively this creates an "imbalance" entry too - because internally 
the total does not balance.

Please find more details and screen shots in the following bug report 
(filed 2 days back)

https://bugs.gnucash.org/show_bug.cgi?id=796766

I am posting here for two reasons:

1) To know if I am using "Credit note" incorrectly (which I doubt)
2) To highlight the bug (if it is indeed a bug) because it is a serious 
"accounting" bug and probably needs addressing on priority.

So please check.

Thank you

Amish.