BUG REPORT: Fileserver Change Configuration saving bug

Hello community,
found another bug. If you have a look at the naming scheme ("Namenskonvention") part of my screenshot you will see on the bottom the checkbox for automatic arm group renaming. 
Now the bug is, that if you only change that checkbox the save button on top is still grayed out and it's not possible to change this setting on its own.

Regards

Marcus