I'm not entirely sure what version this "bug" started to present itself, but as of Cura 2.3.1 it is definitely an issue. I never store material temperatures in my GCODE. Partially because I like to change materials a lot, and mainly because even among PLA or ABS suppliers, filament varies and I often find that 5-10°C differences in my material printing temperatures are needed depending on filament brand. My general workflow is to design a part, export it as an STL, slice that STL in Cura, and then store the GCODE file inside of OctoPrint for future reprints of that part, without needing to re-slice in the future. For that reason alone, storing a material temperature in the GCODE itself makes little sense. Cura's process of selecting the model, printer, material and preset really only makes sense if you're physically printing from Cura, which I would guess is not the norm given how many people are using non-Ultimaker printers, and printing from solutions like OctoPrint.

The way Cura behaves in this regard is a little odd. If you don't add a printing temperature to your preset, Cura will add a “M109 S0” to the start of your GCODE during slicing. Effectively telling your printer to set it's temperature to zero. You've now preheated your printer to the correct temperature for your material, hit print, and nothing happens since your printer is now waiting for the temperature to be set to zero.