Because we're still seeing the same bugs from when Kotfe and Kotet were released. And possibly even further back. For example, Heroic 2 Star Fortress missions, sometimes the exarch's shield can't be drained, making it impossible to kill them, requiring you to reset the phase and start all over. In the Dragon's Maw mission, completing the bonus objective opens a shortcut via a door above the beast pens, but for some reason, the door doesn't open. There's also the issue of the Kotfe companions having their weapons sheathed/holstered in cutscenes, despite having them drawn. I mean, these bugs have been present for literally years, and they don't seem to care enough to fix them.