T365 device encryption doesn work - Galaxy Tab 4 Q&A, Help & Troubleshooting

Hi!
I have a problem. The device encryption (Settings - Security - Encrypt device) does not work for me.
I'm on stock T365XXU1AOA3 (SER) firmare (no root or other mods, pure stock).
After tapping 'encrypt device' and entering password and plugging in a charger, 'black screen with green android' appears for some time (~5 min or so) and then it reboots.
After rebooting it becomes obvious, that device is still not encrypted yet.
What is the problem?

andreya108 said:
Hi!
I have a problem. The device encryption (Settings - Security - Encrypt device) does not work for me.
I'm on stock T365XXU1AOA3 (SER) firmare (no root or other mods, pure stock).
After tapping 'encrypt device' and entering password and plugging in a charger, 'black screen with green android' appears for some time (~5 min or so) and then it reboots.
After rebooting it becomes obvious, that device is still not encrypted yet.
What is the problem?
Click to expand...
Click to collapse
i dont know, never tried that encryption, did you try on a fresh installation? else you can do a factory reset before.
pls tell me if it works so we can test twrp encryption.

I do not understand something, but after reflashing everything it become working.
So I was able to encrypt device and decrypt on stock kernel/rom.
But if I change kernel to custom, which I complied by myself, decryption stops working.
There are messages in logcat from SecureStorageDaemon that it stopped working because kernel is changed.
How can we test twrp encryption?

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