On my Droid Turbo, using the Springfield Forum app, a reply like this one is entered on a line at the bottom of the page.
There is a green circle with the icon for Enter key on it. Hitting that button breaks to a new paragraph.
Some phones have settings in their text messaging program that try to minimize your character count. That used to affect billing for text messages. Suppressing paragraph breaks saves 2 characters ( carriage return and line feed ) for each occurrence.
The problem could be due to using IE8 running on XP. I am still using it because I have several programs that will not run on Windows 7.
The newlines (carriage return / linefeed) are actually in the reply box; they are still there if I copy the text and place it in notepad, for example. So I imagine they are just getting stripped out somewhere in the process of submitting the reply.
I assume everyone starts out with the same default settings when they start using the forum, and since no one seems to be doing anything special, I would guess that the problem lies at my end with IE8.
I had to design a text input box that would normalize input from systems with every encoding and character set that might be used anywhere in the universe... I found that a failsafe mode that passed a subset of html tags like <br> and <p> was necessary to avoid having to debug possibly unique user issues.
Fun stuff parsing every character to eliminate all but a common subset. But why won't his system display it the way he enters it? Something in his system is eliminating the intended function of the Enter key. Is there a setting in his IE that does it?