BREAKING: New Phase of Matter

I now need to read up on this a lot more. The main thing that's getting to me is that they break time-translational symmetry. We know thanks to Noether's theorem that conservation of energy isn't a fundamental law, but an emergent property of time translational symmetry. So when it's broken, energy conservation should also be broken. I have to assume this breaking of energy conservation is highly situational and minor though, like how conservation of momentum is broken within regular crystals but only in the form of phenomena like Umklapp scattering, as crystals break spatial-transitional symmetry, but that doesn't mean we can break the conservation of momentum whenever we like. But still, I am so interested to know to what extent conservation of energy can be broken in time crystals, even if it's small.