Csv Delimiter Dropdown Not Saving In New Product Import Preset.

I'm using the new Advanced product importer, where it lets you create "presets". Whenever I try to change the CSV delimiter dropdown to "Comma" instead of "Semicolon" then hit save, it's doesn't save it. It always goes back to Semicolon.

Is this a known issue, or is there a fix for this?

FYI: I'm using Multi-Vendor 4.8.1.SP1

Thanks.

Try to reproduce the issue on the demo website and post it to the bug tracker