There are two pieces of knowledge that should be interactable but aren't in the solo mode of the dungeon.  I attached a video and the two I'm indicating are "a Brick Sticking Out" at 8:10 time stamp, and the other is "Where cool wind blows" at 17:32 time stamp.  I also noticed that after defeating the first mini boss and using the teleport in the center which takes you to the next mini boss.  If you do this and backtrack to the area you just teleported from, all the knowledge locations in this previous area are not interactable anymore.