@inxcognito Thanks for the video! This helped me!

I was stuck here too, with the same issue. thanks to everyone for the tip. That and the fact I didn't think about throwing the pieces to get through the puzzles was hampering my enjoyment, but i figured that out too.

This is totally a bug .. if the game doesnt work as it should and the correction is to load previous save, you dont solve stupid annoying puzzle by loading an older save.

I even had save after placing the ball on the place but when i noticed i need another, i just went back for another.
First, the puzzle couldnt be completed because its a way one.
Second, by pulling the lever, it resets the ball, removes it .. even from my finished save.

So for me, i had to reload very older save and do it again ..
when i load the save where i had it, it was gone and you cant get another by going back.
First bug is unfinishable puzzle second time, second is removing the ball from finished save because in other game i pulled the lever again