It's an issue with the Plume software rather than Samsung. I reported the issue and worked with them over the phone for a couple days. That was two years ago, so Plume is aware of the issue but my guess is since they're business model is subscription based for all other products, they've stopped supporting the SmartThings line. My advice is get a new router. the final straw for me was when my wifi went down because of an issue on THEIR servers and my internet was otherwise just fine.
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