I've had the same issue with my old Z2 and now with my XA1. So to suggest that this is a handset issue suggests that either I've been incredibly unlucky with my handsets or there's a deeper problem that Sony are pretending doesn't exist. Have a Samsung J5 for a works phone which I have to say has been a good handest with no issues. Will probably go back to them or Huawei in the future as this is incredibly annoying.
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