I got printing issue after upgraded to Cura 3.6. At last, I found that the problem is related to the initial layer. After upgrade, it added a setting to set the height of the first layer, so it raised the print head to 0.1mm, but it doesn't allow to set the first layer height as 0.0mm. This caused the initial layer not attaching well to the print bed. Any way to fix it or any work around?