Halo 2 The Oracle Crashing

My buddy and I have been trying to beat this level on Legendary for six years - since the MCC was first released on console. Every time we get to the cutscene in the mission ‘The Oracle’ where the Heretic seals himself behind a force field (right before we need to cut the cables securing the station) it crashes. We have reached this point in the level dozens of times both on Xbox and PC -old graphics and new graphics. We have every enemy spawn memorized. I know that this issue has been reported on this forum several times, how has it never been fixed? Is there a fix that we’re just not aware of?