I recently experienced a softlock concerning Layer 2 of the Tower on the Blue route where upon doing all Zones up to where I could battle the blue guardians, I instead went and put the grand items in the corrupted areas but for zones 2 and 3 the grand item would visibly appear in the hole nor would the doors to those zones disappear. If I go back, all the Batter says is that an object can be placed in the hole. Killing the blue guardians and being prompted to place the item in that hole prompts the same response without the option to put in the item (since it was taken from my inventory). Edit: I managed to get through Layer 2 by doing the red offerings out of order. Doing that prompted the cutscene so I could leave.