Sims 4 Ladder Glitch

@Pick-a-boo_doo I apologize... you are correct, the behavior of the platform and latter is different in the apartment. Your description clarified for me and triggered my memory. I was able to reproduce what you were describing as follows:

@SmileyFaceGirl04, when I went into the apartment you mentioned and built a platform against the wall in the manner you did, I found also (as @Pick-a-boo_doo  mentioned) that the Sim would go up the ladder if I clicked 'go here' on the platform (which is also what I did in my test earlier today), but if I clicked the ladder and told her to climb up, she stood off to the side as your Sim did in the video - no blocked thought, but she did not climb. 

However, I then put something enticing up on the platform (what Sim doesn't want to play the game pad any time, any way possible?), and then she started to climb autonomously, but first climbed into the floor (down) then climbed up after climbing down a few steps. 

So, I tried an experiment. I made a platform that did not touch the wall on any side (keep at least one tile of space between the platform and the wall.) Then the Sim had no issue, and did not climb in any glitchy way.

I remember experimenting when platforms first came out and seeing this issue in a home. Ever since then I have always made sure my platforms do not touch a wall. I also carefully play-test when I build with platforms to see if there is any issue for Sim use. Hope this helps.