Contribution entries are not being created while recording 'adjusted payment' for installments of a pledge

Steps to reproduce :

1) Visit a 'New Pledge create' form, enter details like total amount 2400, installments 10 (monthly) and save it.
2) Visit Pledge View of that contact by visiting contact summary page.
3) Record payment for the first installment, while recording adjust the payment amount to 300 and save it.

• You can see a contribution entry being recorded for this.
  4) Now, record payment for second installment, while recording adjust the amount to 250 and save it.
• Here you see in the contribution tab for the same contact, the previous installment contribution is edited to current amount.
• The right behaviour should be : new contribution entry should be recorded for this installment as well.

In v4.3.5 it worked fine.