Not sure, Like I said before the Game will always softlock if you leave the Room before 45 seconds run out, I can repeat this as many Times as I want this always happens. Only when I stay in the Room for 45 Seconds or more the next Level will be loaded.
The second part or the Trigger that puts the Ending on the Floor of the Room with the Ghost Girls doesn´t seem to work right, maybe for some Reason the Game is unable to put the End Trigger on a spot you are standing in some Circumstances.
I guess this could also have something to do with how your PC is build because nothing else makes sense to me. So other People in theory could also get this bug as well. Even it doesn´t affect your specific PC Build.
I would just revert to the previous basic Timetrigger, that never made Problems no matter how many Times i repeat this Level, I have kept older Builds of your Sad Satan Revisited and have zero Issues here. Only the ones where you changed the Trigger make Problems.