>Studies published in 2000 considered this hypothetical effect to be responsible for warming events in and at the end of the Last Glacial Maximum,[6] but the distinct deuterium/hydrogen (D/H) isotope ratio indicates the methane was released by wetlands instead.[7][8] Although periods of increased atmospheric methane match periods of continental-slope failure.[3][4]

I'm unaware of continental slope failure being commonly attributed to global warming.