monaco-editor npm version: 0.7.0
Browser: Chrome
OS: Windows 8

Reproduce step:

1. Go to playground https://microsoft.github.io/monaco-editor/playground.html
2. Type some Japanese text like あいう without pressing ENTER key.

Expectation:
Show あいう with underline (as usual for Japanese input).

Actual:
Show last character only, in this case う.

Other Info:
VS Code handle correctly.