Emulator

What's the problem? Describe what went wrong in few words.

When I open a User/Documents Game .ini file through the Properties dialog,
change anything and save the file, the whole input of the file is deleted when I close the file.

Which versions of Dolphin did you test on?

I have this problem since Dolphin 4.0 was released.

Does using an older version of Dolphin solve your issue? If yes, which
versions of Dolphin used to work?

On Dolphin 3.5, this issue doesn't appear.

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)

Here is a screen video of the issue. I demonstrate it with the Gecko Codes here, but also any other input will be deleted upon changing:

http://www.vidup.de/v/RPl90/