Regarding two bugs when using an IME in the Note editor

[古道(http://www.GudaoVision.com)]

Bug 1:
When typing in a Note while using an input method (for example, the default Chinese IME in Windows), the composition box suddenly disappears for no reason, along with all the text that was being composed. This happens very frequently and seriously affects typing—especially since modern Chinese IMEs often use long-phrase input. The composed text usually just vanishes suddenly.

Bug 2:
While typing in a Note, the composition box sometimes jumps up and down as you type. This behavior appears intermittently, and it seems less likely to occur when Markdown formatting is turned off.

I hope this can be fixed. Thank you!