Permanent and unprovoked BOS hostility?
If I travel with Danse, complete any quest/ wander around for a while, dismiss him, then fast travel to any Brotherhood occupied location (i.e. Boston Airport, The Prydwen), everyone within the vicinity proceeds to gun me into Swiss cheese. I have not once hurt a single member of the BOS while traveling with him previously, and back before I’d experienced bugs, dismissing him to another settlement after traveling together for extended periods of time did not cause the hostility. I haven’t gotten very far in Railroad quests, I’m permanently hostile with the Institute, I stopped doing Brotherhood quests after Blind Betrayal, and the faction I plan on ending the main story with is the Minutemen.