nor able to sweep up brick dust on the floor for decades because it is “destined” to be reverse-bullet damage that is fixed in the future.
(In the movie, you see them walk into a pre-damaged room that is later ‘repaired’ by the inverted gunfire that caused it)
I’d say it is the sort of premise that the writers thought sounded clever but is actually boring as hell (imho, after a single sloggy viewing)