Command "textual run" results in a broken display

[bclemmey]

Since updating to 0.21.0 textual run has been broken. Also tested and the same happens in 0.22.0. Instead of the application displaying I get the following:

Moving the mouse around spams various characters on screen in the position you can see them in in the screenshot. Cannot break out of the application using ctrl+c, the terminal window has to be closed.
If run using python main.py instead the app loads as expected. Downgrading to a 0.20.x release also clears the issue.

Tested in powershell and cmd with the same result. I am running Windows 11.

Example app used to confirm, only textual installed to a venv.

from textual.app import App, ComposeResult
from textual.widgets import Label

class App(App):
    def compose(self) -> ComposeResult:
        yield Label("Example")

if __name__ == '__main__':
    app = App()
    app.run()

Textual Diagnostics

Versions

Name	Value
Textual	0.22.0
Rich	13.3.4

Python

Name	Value
Version	3.10.5
Implementation	CPython
Compiler	MSC v.1929 64 bit (AMD64)
Executable	C:\Users\Ben Clemmey\PycharmProjects\instanceBrowser\venv\Scripts\python.exe

Operating System

Name	Value
System	Windows
Release	10
Version	10.0.22621

Terminal

Name	Value
Terminal Application	Windows Terminal
TERM	Not set
COLORTERM	Not set
FORCE_COLOR	Not set
NO_COLOR	Not set

Rich Console options

Name	Value
size	width=79, height=25
legacy_windows	True
min_width	1
max_width	79
is_terminal	False
encoding	cp1252
max_height	25
justify	None
overflow	None
no_wrap	False
highlight	None
markup	None
height	None

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