Really thanks for your engagement (and also good opinion). I spent entire month to test everything trying to avoid that "surprises" like this. If it's possible, write me step-by-step how to provoke this issue and in the next update I'll try to eliminate this bug.
So, like, after I noticed that I could replay levels and get more skill points, I started a second file and just replayed level 1 a bunch until I had, like, 30 skill points. And then I just played through the game like normal from then out and, if I got more skill points after I had maxed everything out, it just wouldn't let me leave the attribute screen.