Controller Remapping: l2 assignment stored incorrectly

[manum45]

In some cases the controller remapping value for l2 seems to be overwritten with the value of the setting for left.
It seems to occur if any negative axis is assigned to left.
The axis name is shown correctly in the controls config window, but as soon as I click "Save and Close" in the Configuration window the incorrect value is written to the ini file.
When configuring this manually in the ini file there is no issue, until I save the config again from the Launcher.

Background:
I tried to configure steering to the left stick -> left=-leftx
And the camera to the right stick ->l2=-rightx
When saving the config left=-leftx and l2=-leftx is written to the ini file.

Full config is attached (had to change the file extension due to github).
config.ini.txt