Blood Swamps Secret Encounter "bug"

The moment you see the way to the secret encounter you probably tried to just jump up there right after grabbing the lore file and then were surprised like "Wait, why doesn't he grab the ledge? Is it bugged?". That's what I was thinking anyway.
Turns out it's not reachable from this point, even though you clearly see that Doomguy would be able to climb there. Well, the thing is - the devs have added a huge invisible wall blocking the way up, because they intended you to go a different route.

As soon as you finish the running wolf sequence you will end up in an open area with some pillars/platforms nearby. Jump on one of those platforms. Search for a monkey bar that leads to a hidden climbable wall. That's our way to the secret encounter.
That's the monkey bar we're looking for. Jump to it and then to a climbable wall. The "Secret Found" should pop up as soon as you reach the top. After that you'll know where to go.

The only reason I made this little guide is because I was struggling with this secret myself on my first playthrough. It's possible I am not the only one who had troubles with it. So yes, I hope this helps.
Feel free to ask questions in the comments if something is unclear.
Thank you!