"Wrong PIN" after TWRP restore

I made a TWRP backup yesterday to play with the stock ROM for a bit, but after restoring it today I can't unlock it. Every time I enter my PIN it says "Wrong PIN." I have no idea why. I've tried wiping everything but the SD card in TWRP before restoring again, but it still won't unlock. Anyone know what could be causing this?

T-Mobile G4 (H811)
Cyanogenmod 13.0
TWRP 3.0.2.0

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