I've imported a few .md files and encountered this problem:
example 1: _text_ text
example 2: _text _text
expected behavior for both: text text
actual behavior for example 2 in the jotterpad markdown editor: _text _text
so when there's a space before the underscore, the editor treats it like the underscores were escaped with the backslash, even though there aren't backslashes in my original file.