Not sure what was happening as it hasn't done it again. I was replying to post at G+ and the Note would appear to freeze, one time it was probably close to 15 seconds. During this time the Return & Menu buttons would not light. Didn't try Home didn't want to loose the post. Reminds me of ho.w my Nexus 7 2014 acted when I bought it. Finally after several updates it was fixed & the wife doesn't complain so I'll assume its fixed.
Is this a known issue or just something strange happening at the time?
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