My Samsung keyboard has not been working correctly for the past week. I noticed all the words it's learned for the past 3 years are now gone. I'll put in a new word and hit the check mark button. It'll remember that one word until I close out the keyboard and reload it, then it forgets all the words I check marked. I've tried force closing the keyboard, resetting the options and the personal data, cleared the app data and cache, cleared my partition cache, rebooted the phone multiple times and everything else I can think of.
Is there something I'm missing? How do I get predictive text to save/learn words again? I'm running Android 6.0.1.