Text disappears when using Japanese input/IME on Windows with conhost

[ajantti]

Trying to write Japanese text in conhost on Windows makes the text disappear almost immediately after typing. After confirming the input, it comes back though, but it's not really optimal for user experience.

Start typing, you can see the text for a fraction of a second:

After you stop typing, it then disappears:

Hitting enter, it appears again:

Textual Diagnostics

Versions

Name	Value
Textual	1.0.0
Rich	13.9.4

Python

Name	Value
Version	3.10.11
Implementation	CPython
Compiler	MSC v.1929 64 bit (AMD64)
Executable	C:\work\mkgtools\Tool\MKGConfluenceTool\venv\Scripts\python.exe

Operating System

Name	Value
System	Windows
Release	10
Version	10.0.19045

Terminal

Name	Value
Terminal Application	Unknown
TERM	xterm
COLORTERM	Not set
FORCE_COLOR	Not set
NO_COLOR	Not set

Rich Console options

Name	Value
size	width=119, height=30
legacy_windows	True
min_width	1
max_width	119
is_terminal	True
encoding	utf-8
max_height	30
justify	None
overflow	None
no_wrap	False
highlight	None
markup	None
height	None

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