Kinda hard to see, but the black light stains are popping up on a number of shoes...not that I totally think it matters in the grand scheme of things, but this type of flaw definitely should matter to a long-term collector/holder. Why?
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If this glue is like most glue, it's going to turn yellow in just that one little spot, making the flaw visible even without the blacklight... .
I think there's a difference between collectors and wearers and I think it's important to figure out what you are. If something like this - a blacklight flaw - bothers you are probably a collector.