I have correctly solved Kblackbox puzzle on "Extremely hard" level, and double checked all the lasers before clicking that "Done" button. What happened next: despite my solution was 100% correct, the game discarded it because it thinks there is only one solution for each generated puzzle! I believe that its a false approach. Instead of checking if my solution matches the game's solution, the game should have traced all the lasers in MY solution are moving to the correct destinations specified on the board

Reproducible: Sometimes

Steps to Reproduce:
Gain the experience, then play on some high difficulty level, such as "extremely hard", for several times

Actual Results:  
My 100% correct solution was discarded because the game thinks there is only one solution for each generated puzzle

Expected Results:  
Instead of checking if my solution matches the game's solution, the game should have traced if all the lasers in MY solution are moving to the correct destinations specified on the board