G_Obada_H_eXTV , Sep 8, 2019 : my device accepted fingerprint but asked for PIN for security and I was 100% sure that the PIN was right but it keeps saying that the PIN is wrong, I tried accessing safe mode and recovery mode but it was showing wrong PIN as well. taking in notice this problem happened twice with 2 OnePlus 5 devices one of them was using 6-digit-PIN and the other was using 8-digit-PIN. eventually there was no other solution but to hard rest both of the devices. this bug should be taken in consideration and be fixed ASAP. if there is any other solutions please let me know.