On the “Pillar of Autumn” campaign level, there are some stairs that are missing a collision box on their railings. It is seconds before you encounter the first two hunters in the level. I have recorded a video of the bug and a screenshot of the location here: https://drive.google.com/drive/folders/13yhNlrpk_B-P4-HTmWtZQ9JNxmR5zuap?usp=sharing