Haven't resolved the issue as of yet. But I do agree that some sort of short is very likely. Especially with all the other typical battery drain issues having been tested(brightness, bluetooth, background app refresh, Etc... Not convinced it isn't the replacement screen though. If there was a minor short in the cabling it could still cause current drain even if the battery cables are fine. Parasitic drain could likely come from many parts of the phone if there was a short within a given component.