game crashes when i try to load into breach boss and big maps

Hello, this has been going on since I reached the end game and started mapping. Whenever I try and load into a big map ie has breach+ritual+something etc, my game has crashed 100% of the time. I've been getting around this by just avoiding them, its worked so far just very annoying. But today I tried to into my first breach boss. And the same thing happened. Know I can't actively progress the game and am being soft locked. I've tried everything I could think of to fix it but to no avail. I've lowered every setting I can to the minimum it can go, tried with a friend, and read a post that changing the network file to lockstep instead of auto. And nothing has fixed it. I dont know what else to do. I would love some help. Thanks for reading