Are you noticing that in AutoCAD 2015, the linetypes that you have set on your hatch are showing as continuous? If this is the case, you may need to change the HPLINETYPE variable. By default, this variable is off to save on system resources. But one of the side effects of it being off is that hatch linetypes will not be displayed. Turn the HPLINETYPE variable to 1, and all should show correctly again.