Wait for the download to start automatically
Sorry I'm not advanced enough to pull logcat. I even read up on how to and still not sure. I am on 4.4 just figured I would state that after I flashed in recovery like you said to do, it said successful. Optimized apps on boot then Samsung keyboard stopped working message appears. It happened whether believed or not. Back to google keyboard but I gave you a thanks anyway, relax no biggie
Once I get back from vacation I will see what I can do to help you out. Till then maybe this will help others out.
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