I know this post is a little older but in the event anyone else encounters this bug I may have a possible reasoning and solution to it. At the very least this is a possible variation of this bug to which I experienced.
Follow the patterns as previously described in this thread however when you need to cross from a floor panel to the center area (the yellowish floor) where the lever is jump over the perimeter of it rather than walk. You will also want to jump over where the gates used to be as well (the ones you lower) but do not step onto the side where there is no panel. Don't make contact with the spot to which the gate is lowered in. It may still be a little buggy but I managed to finish it on my second try after doing it this way.
Now as for the reasoning. I believe this bug has something to do with the boundary of the center area and the floor panels somehow registering multiple steps as you cross from one to the other. Same with the original gated areas.
I believe this to be the case because of a few factors.
- The Tactical camera seemed to have issues pathing onto this area at all, at least for me. I couldn't send anyone onto it but I could send them off. For instance if I was standing with the lever slightly to the left and behind me and in the tactical camera I told my character to move to the starting floor panel my character would immediately move to the panel to my right (the nearest panel) and follow the border (stepping on all the tiles) to get to that panel rather than heading in a straight line to it.
- The companions seemed to never want to stand on center floor unless I was controlling them. If I told them to hold position and than swap character the game would warp them to the perimeter (onto the floor tiles).
- One of the times I attempted to move my character from the center area to the first panel using the tactical camera failed. I told it to move onto the floor panel and he lifted his leg and kind of wobbled back and forth in place with his foot hanging in the air while it trying to figure out how to cross. My character than turned around a couple times and walked in place and continued to do that until I manually forced it to step onto the panel.
I'm sorry for the length of this post but this was what I came up with and believe to be the case. I hope it helps!
Edit: I should also add that I did not use the tactical camera to move my character on my successful attempt after using these methods.
