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I strongly suspect this is user error. But here is what is happening: filament 0 prints. The print head moves to the switch and filament 1 unloads instead of filament 0. Filament 2 then attempts to load instead of filament 1; but is stopped by filament 0 which is still in the way. Any ideas on what could be causing this? The only change I made to the gcode for filament change from what mk4 gcode generator was to change 'temperature' to 'nozzle_temperature' on OrcaSlicer (2.1.0dev) per Bill's advice.