I have a much different bike, but the WTB tires that came on mine were OEM-spec and very much NOT full tubeless, with no butyl layer, even though WTB do make a tubeless version. I set them up tubeless anyhow and over their lives they've tended to dry out the sealant pretty quickly, and it deposits in a layer on the carcass, so I've never seen a "booger" in them. I've worn out one of them and replaced it with a "real" tubeless tire that's holding air SO MUCH better. Other than that problem they've worked fine, no cuts or tears and the only flat I had was with dried-out sealant.
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Genesis 49:16-17