Unless your printer is faulty, the only reason this would happen is if the Gcode told it to.Pop the STL back in to Cura, slice it then use the slider to check the layer build, if it looks right create a new Gcode and try again.Make sure you have no macros set up i.e.where you would set pause at height etc as it may be poss to create this - and unless you remove any /all macros this Coul be repeated.If you are not sure about macros ask here, maybe someone is on Cura and could screen shot to show where they are.Hope this helps.