Can not input CJK with Fictx when write email

Description

We can not use Fcitx with Show preedit within application option enable to input Chinese Character when writing email.

To Reproduce…

Expected Behavior

It’s work fine in Firefox.

Setup

  • OS and Version: Arch Linux x86_64
  • Installation Method: from aur/mailspring
  • Mailspring Version: 1.9.2

Additional Context

  • input method framework: Fcixt (with Show preedit within application option enabled)

I have the same problem. I don’t know how to fix it.