After many years looping around the same level, this discovery made an end to this today!
The levels ending objective is in the room next to the starting area. @Lance who originally found a collision error in the beginning of the level, just past the first door.
We thought it to not be THAT useful but after using the "Robots helper" tool, we found that under that area is collision. Basically the floor from the first area extending underneath the door.
By doing a pixel perfect jump you can fall through the floor. Once under the map you have to time a perfect double jump and this will result in you standin on that extended peace of collision.
This makes it we can run semi OOB and run around the wall that prevented us from entering that final section where the end objective is.
@Steakshake was the first person who found the correct coordinates and executed the skip.
Video link: https://drive.google.com/file/d/1JyQXZTedRHq1Ggs3_Uc0D6OTLImrQV4R/view?usp=sharing