Dual Extruder Right Nozzle doesn't lift

[Hauke]

Would contact support. There seem to be cases of a broken linear module - see here (also interesting for the others because of the video on dismantling/reassembly of the DX):

Dual Extruder Calibration, X axis Issue

Yes please do. Here is the link they sent me that shows how to replace the linear rail. [Double extrusion module replace guide rail]