It's mad easy I'm telling you, basically straight forward 1 step glitch. Happy weekend people
1. In your facility go order stike team to anyone and observe target
2. When observing, hold option button, hit circle and release option. Options menu should appear. Open rockstar mission fast and back out from mission
PC: (On normal settings) Option button = p , circle = ESC.
So you hold p then press ESC then release p millisecond after pressing ESC.
Check your big minimap, if no marker then you are otr now, exit from facility however you want
And yes, you have marker again when outside of facility
If you can't make calls and can't enter back to facility then all good
Don't worry if you die, you spawn normally and still otr