Does not work the language changing key before setting preset on text filter

Hello.
I am Korean user.
I love shotcut program and use it many times.
But I always got inconvenience bug during use text filter.

Please check below step.

step

Add text filter.
Try to change language with keyboard.
–> It does not work.

Write any a character.
Click preset widget.
Try to change language with keyboard.
–> It works.

People report a similar problem with Chinese:
https://forum.shotcut.org/search?q=text%20chinese

Can you change the input language using the system task bar? You might need to enable it. For, example on Windows:

Also, you mention “text” filter, but there are 3 text filters. There is no fix coming soon unless someone volunteers. In the meantime, use a workaround.