I had the same problem with 4 HD120's and a Commander Pro on the latest firmware, I couldn't control Fan 1, but Fans 2-4 were fine.
Went into setting and forced a firmware update. Once complete, Fan 1 began working as expected.
Quick question regarding the 570x front panel kit - In addition to the USB 3.1 connector, does it also have USB 2.0 and/or 3.0 connector like the Obsidian 750D version? Or just the USB 3.1 connector.
If possible, it would be great to a picture like this for the 570x version.
Thanks!