Updates: The Institute faction is set to ally with the player faction despite the player not joining it canonically. Using [ setenemy institute player ] temporarily fixes the bug. Mods don't cause the issue to occur on a new save (synths are always enemies when spawned very early), something gets messed up during gameplay. Synths spawned using placeatme aren't exempt from the bug, they are aggro on new save and passive on bugged save. Playing a new character now until it the issue pops back up. Original post: When exploring, all enemy synth groups are friendly to the player, including those spawned by mods and scripted to spawn inside of Fort Hagen (as part of story.) FO4Edit doesn't show any overwrites of the Synth or Institute faction forms. AFAIK I have no mods that change factions (aside from Docile RadStags, which only affects radstags.) Here is my mod list: