Purchase Order Payment Terms not displayed

Hi,
We were using Dolibarr and had no issue, but just today morning while creating Purchase order, we noticed its giving some numbers instead of Payment terms. It does show the proper payment terms, if it is used from the inbuilt terms. But when selecting the payment terms, as input in dictionary for additional payment terms, it shows only numbers.

This is only happening in Purchase order module so far and not disturbing in Commercial Proposal.

Anyone can help in this?
Thanks.
AM