How to change IME for inputting unicode into bottom command margin

[alker0]

Describe the bug
Enabling Use Editor Command Margin prevents me from toggling IME and inputting unicode in command mode and search mode.

To Reproduce
Steps to reproduce the behavior:

1. In extension's option, enable Use Editor Command Margin
2. Press the IME switching key in your keyboard
3. See current IME mode icon in task bar (and that is not changed)
4. Input some keys
5. See result input (and that all the characters are single-byte)

Expected behavior
IME switches mode and allows to input language specific characters.

Environment (please complete the following information):

• Visual Studio version: 2019
• VsVim version: 2.8.0.0
• Programming Language: C#
• Check(Type 'x') any that are installed:
  • ReSharper
  • Visual Assist

Additional context
You can change IME mode with mouse clicking the IME mode icon in task bar when command mode but it does not make you input multi-byte characters into command margin.
set imsearch=2 and set imcmdline=2 change only task bar IME icon but inputting behavior.