Here are some tips for sandy:
- Listen out for her primary sound que, its the only character with a run that gets faster, in the new update, this is a very loud sound que.
- After the door, she has linear pathing. Meaning she can't move backwards during this path, and only move to the right door.
- Basically after you've blocked her run, she will turn into a normal door based character. You can follow her on cameras to the right door. Or rely on listening on her footsteps.
I'm very not sure what you mean with the random part, as after the run she only moves to the right door and nothing else, I hope these tips help!