Please note, the RF1000community Github organisation is no longer connected to the rf1000.de forums. We are still open for contributions, bug reports etc. by anyone obeying the netiquette.
Unfortunately, the old Repetier-based firmware is hard to maintain, hence likely nobody will deal with bug reports there. All development effort (the little effort which is still spent here) shall go into the Klipper-based firmware.
Feel free to open discussions if you want to get in touch. Don't hesitate to write in German.