Nonsense.
First of all, it's a quick-save game. There's almost no meaningful stakes. Even if someone turned out to be a synth that betrayed you, at worst you'd just go back to the last auto save.
Second, even if they did the combat is so janky you'd probably get shot a couple times, realize what's happening, and then win the fight anyway.
Third, that never happens.
The whole game is an incoherent mess. It's three under baked games in a trench coat.
Apparently it saves when you sleep in a bed, so I guess there are some stakes but they're still pretty low.
Never played survival mode myself