'PayPal, Payflow and Java - Comments are not sent/saved

I have an application that send payments to PayPal.

The issue is that transactions contain Comment1 and Comment2 fields and sometimes these are sent to PayPal and I can see them in the PayPal Manager, but others there aren't.

I'm sending AuthorizationTransaction and ReferenceTransaction to register different kind of payments. The Invoice always contains both comments.

What could be the reason to not register the comments?

Various documentation doesn't mention anything

Payflow Java Guide

Payflow SDK

Payflow documentation



Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source