I’m using Black hole and have taken the Binary System node in its skill tree. Binary system has a link that is 1 point to the Infusion node above it. I cannot place a skill point in Infusion after having taken the Binary System node. This may be intended, but just a visual bug with the skill tree itself.
I was playing around in lastepochtools when I noticed this behavior and thought it was just a bug with the website.
Please let me know if there is any other information I can provide on this.