Line break disappears after saving data

Hi,

I'm new in MyCollab and testing to use it for managing our team project.

I faced a very weird bug. 

1. When I typed some text with line break(enter) and save it, it shows only text without line break.

<typed text>

<view page>

preview page shows a proper page.

2. Especially it's always occured in pages menu. 

  I can see same phenomenon in other pages, but it's not always.

Is it CKEditor problem? or MyCollab has some restrictions?

I really like MyCollab and wanna use it for our project. But this is quite big problem in our team.

I hope I can get some answer for this.

Thank you!