Hello !
Not sure if it is intended or if it is a bug, since the composer wasn't existing before EB5. But if you add a text block, and paste a texte that have a html formatting (Like, some underlined/bold words, carriage return, etc...), this formatting doesn't apply on the text block, and you have to do it again.
It's possible to use the html block to avoid this problem, but it means I must paste my text on another editor, and then convert it to html code, which is really not cool to do, considering it's also less easy to edit :/
It mays be not really easy to understand, so, I added a screenshot of it.