Plot hole: Mike was given a conditional release from prison (on parole) and could be returned to prison if he violated the conditions of parole. Associating with known criminals, taking/ selling illegal drugs, domestic violence or other problems would constitute a violation. Mike assaulted and threatened Dahlia - more than enough "bad behavior" to get his parole revoked. Neither Dahlia nor Parker thought to report Mike to his parole officer. Instead, they fled and hid from him, staying in fear. (00:13:15 - 00:45:50)
The Gateway (2021)
1 plot hole - chronological order
Character mistake: Detective King (?) told Mikey, "You're on probation. You got no rights." King knew Mikey had been in prison, so should have said, "You're on parole" (not probation). Although a layperson might use probation and parole interchangeably, an employee in the criminal justice system (such as a detective) should know the differences between the terms and use the right one. A parolee is given an early, conditional release from prison and has fewer "rights" than a probationer. (00:47:10)