Yikes, first time I've seen Kevlar shredded... and 2" width?!
Taking a wild-azz guess at spec, but Kevlar like that should be at least 3000lb rating. But Fugal has 1200lb so it must be very thin, so maybe something breached and it cascaded from there.
However, with adequate slippage and heat build-up it definitely could happen. Kevlar is rated at about 500°F melt point.
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