I have the same problem and am so glad it's not just me. I returned my first uke because I thought there was a defect. My second uke still has the same problem. I'm picking more so it's not happening as fast but I was going through a new G every week when I first started out. I sent my uke out to a guitar repair person and he said there was nothing wrong with my uke, so It seems to be nature of the beast.
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