S4 mini forget encryption pin - Galaxy S 4 Mini Q&A, Help & Troubleshooting

Hi everybody,
I have got a couple of S4 mini, which are encrypted and saved via a 4 digit PIN.
Three of these devices had the problem, that they canĀ“t remember the correct PIN to decrypt the device after a power down.
So I had to wipe all three devices and installed them again.
Anybody heared something about this problem? Is anybody knowing a specal reason for this behaviour?
Thanks in advice
Temporer

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THEDARKEST said:
Hi there,
2 Days ago I just upgraded to the new official Dutch ROM.
Everyhting seemed ok, untill now.
The TP2 is password protected and I can't unlock it anymore.
It says that I'm entering the wrong password but I know it's correct.
This morning it still worked.
I know I can solve the problem with a hard reset, but then I'll loose my whole contact list.
Does anyone know what I can try?
Thanks in advance.
Click to expand...
Click to collapse
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