Xsarius keys are send twice by Sofatabon U1

Ik have a Xsarius Sniper II 4K (Model number: 00 1B 79 F8 5F 06) and I learned the keys to my U1 with help from the original remote. But I cannot use Channel Up/Down, ArrowUp, ArrowDown, ArrowLeft and ArrowRight on the U1 because they are send twice. So for example when you press the ArrowDown button it goes 2 positions down instead of 1. So I cannot select certain position because it always skips 1 position.
Is there a solution for this bug ?