I found this post on an android help thread, tried it and it worked!:
"I went to settings in camera then hit "reset settings". I then noticed when taking a selfie that there were 2 icons in the middle of the selfie screen. One was a one person setting and the other a 2 person setting. I switched this setting and my selfies were centered again. For some odd reason I need to have the 2 person setting on for selfies even of 1 person to be centered."
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