My solution to the problem was connecting the IRQ pin of NRF to an empty port in Arduino, D7 port to be precise. It isn’t used in the code and was floating previously as many instructions on the web tell to just leave it hanging. Also an interesting fact regarding the noise, none of the touching of Arduino didn’t help at all, the issue was fixed after touching the NRF. Also the noise was so significant that it event caused to affect Arduino’s serial output which was screwed from time to time. After connecting the IRQ pin the issue resolved…