I have successfully printed dual material with support on UM3 using Cura, but when I disable support to only print with the main material, the printer prints the first layer fine, then extrudes a bit of support on the side of the model, then continues printing the rest of the model with the main material. The extruded support sometimes sticks to the tip and ruins the print, so I have to watch the print and remove it by hand before it continues.
Is this an intended feature for some reason? Is it a bug in the software, or maybe just a setting that I can disable somewhere? I guess I could remove the support cartridge or somehow disable it, but am looking for the quickest way to do it since I will be switching between single and multi material quite a lot.