Life was already well established 635 million years ago. We have the stromatolites to prove it. The question should be, 'Did multi-cellular life arise twice?" Even if the Earth had been completely covered in ice, life would still have survived around volcanic vents in the oceans and in the deep rock.
I saw a mini-series called Miracle Planet and it described a still forming Earth being bombarded where not only is the
ocean completely vaporized the Earth's crust was heated to sterilizing temperatures down to several kilometers and the only life that could survive that would have been deep in the crust.
There may have indeed been multiple origins of life on the early Earth. There may even be an undiscovered
shadow biosphere.