iOS keeps changing formatting

I’ll have a Scriv that I’ve set up on my Desktop. The documents within it are all set to have an extra line break at the end of paragraphs.

However, when I start adding to a document in iOS, eg a half-written scene, the formatting reverts to single/no extra line breaks - within the same document/text file.

How can I fix this?

What version desktop Scriv are you using and what version iOS Scriv please?

That might help in figuring it out.