Missing Phone icon topic

Hi, happy new year to all at XDA!
Does anyone else get this bizarre event? every now and the when I switch on my N910F my green phone icon disappears? usually stopping then restarting touchwiz, or a restart solves this issue. I have noticed this problem with every stock ROM I have tried as well.
I usually do a wipe cache and data after after each ROM flashed, and sometimes flash ROM twice if glitchy, but problem seems intermittent?
Thanks in advance

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