Suppose your problem goes up due to some space character before the comma, for example ... text , This ... when it should be ... text, This ....
At least this is the only reason I see. If you look at this script, you will find that the text in the third <p> will never be wrapped, as you mentioned. (you may need to choose a different width for your browser. The example above works in Chrome, but for the width of Firefox is slightly different)
So, just make sure you have no spaces between the text and the comma.
source share