Item webpage formatting not "holding"

[DinaLRosenberg]

I've noticed recently that our item formatting isn't "holding". Where we have lines separated by spaces the descriptions all lump together and become one continuous block of text.. 

Anyone else notice this? Attached a photo so you can see what I'm talking about?

[Fetched-Up]

Web or mobile or both?

Spot checked a few of mine and they seem to be fine. 

When you do your descriptions, are you cutting and pasting from another document?  I get better results when I paste with the "paste and match style" on my Mac.  I manually go back and format.