Hello, hn. I come here for help and to document a bug, maybe Apple will take notice of this and will do something about it.

The bug is the following: an iPad Pro (iOS version between 14.x.x and 16.x.x) rejects the correct passcode for the device. I am 100% correct that this is the passcode, it has been the same for the device for more than one year. The device keeps locking me out, saying "Incorrect password". I have had to wait over a day to even try.

After almost giving up, I tried updating my iPad Pro to the most recent iPad OS version at the time (16.4.1).

After that, a Data Recovery screen appeared. It asked for the device's passcode. After entering the correct device passcode it asked for confirmation again, I entered it again and it said that it was performing data recovery. I assume that the device confirmed that the passcode was indeed correct because it did not say anything along the lines of 'incorrect passcode'. Now, the next problem is that after the Apple status bar (like in the updates) ends it says 'Data Recovery Failed'. I tried yet again doing the process of attempting data recovery by entering the passcode and confirming it again, yet it showed the same: 'Data Recovery Failed'.

I then tried to restart the device, did successfully and then showed a screen that said: 'Try again in 8 hours', just like the passcode screen that tells you to wait until you can try again.

Any suggestions on trying to debug this ?