Generally, you should include:
What went wrong?
+ to skill logic is broken :: Last Epoch Steam-related Discussion - here is a Steam report topik.
Issue is
So I have skill lvl 20, I spent my points to make it as i want. Next, I wear any item with +4 to this skill, spent additional points. But when I un-wear this item system will took minus random skill points from my skill → so my skill tree will be broken.
Thanks!