K380 unable to pair, incorrect PIN

CAT S60, Android 6.0.1
I'm keep having this issue, no matter how fast I enter the PIN code.

K380 Incorrect PIN - Unable to Pair
https://community.logitech.com/s/question/0D55A00006uu6qVSAQ/k380-incorrect-pin-unable-to-pair

I was having this same problem. I found if I pressed the backspace key around 800 times then typed the pin, then pressed enter, it worked. Good luck. Logitech you **** a little

Things is not getting better even after I tried the above, until I hit the in a extremely high frequency. Not necessary 800 times, which seems impossible to me, but maybe 5-10 times per second before I could input the PIN.