Nord just told us about this one:

 The new Nord Electro 4D OS v1.06 fixes a USB-MIDI bug that could cause the instrument to hang when receiving/transmitting USB-MIDI messages. The update also fixes a bug where the onboard keyboard could produce unwanted Note Off messages in MIDI Local Off mode. An issue where the piano engine under certain circumstances could produce a click when releasing the sustain pedal has also been resolved. See the update history for a complete account of what's new in this update.

Get the new OS update  Nord Electro 4D 

Clavia Social

• NAMM 2016: Nord Piano 3 Demo 23-Jan-16
• Clavia Tease New Piano? 13-Jan-16
• NAMM 2015: Nord Electro 5 - video 26-Jan-15
• Nord Mellow Upright Piano Soundset Released 27-Oct-14
• NAMM 2014: Nord Lead A1 - First look 22-Jan-14