I have been playing around with LyX and XeTeX a lot recently, hoping to find a setup which allows me to switch easily between Chinese, Japanese and Korean (CJK) language input. I have set up a document with Local Layouts for each language, so Text Styles for CJK are easily accessible through the context menu. Although this seems to work well for separate words and short sentences, I am bothered by the inability to enter line breaks in sections formatted for a certain language. I can copy and paste text with line breaks from other sources into these sections, and I can force a line break using CTRL + Enter, but I was wondering if there is a way for me to enter normal line breaks directly that does not involve ERT insets?

Have a look at the attached LyX document for an illustration of the problem. When placing the cursor in any text area formated for CJK text and pressing Enter LyX will tell you "Command Disabled".
Note: I am working on an Ubuntu 12.04 system (64bit) with LyX 2.0.6, fully updated. I have all the necessary packages and fonts for LaTeX/XeTeX and CJK installed. Line breaks work fine when working with the source file (File -> Export) and compiling in XeTeX directly.