John Stewart Bell pointed out this problem in his paper on Einstein-Podoski Rosen Paradox published in 1964. Bell's theorem describes the observation that two entangled particles will be sent in opposite directions, one particle will take action to change its state (such as the direction of spin), and when the state changes, the entangled particles will change the same state "instantly", which is obviously faster than the speed of light.
Albert Einstein called this phenomenon "ghost behavior at a distance". This is Einstein's frustration, because he wanted to solve the problem within the scope of special relativity. Einstein was troubled by this observation, which prompted him to put forward a more comprehensive theory at the last moment of his life to solve how this phenomenon happened.
Some people may say that entanglement is broken by other influences of particles/waves (as michael woods said). However, the basic premise of quantum theory presents a world where all possible states occur at the same time, a superposition state, and once the measurement occurs, it can "collapse" to a unified position. The same is true for the measurement of entangled states. The current view is that the information from the entangled state will not be lost, but in some cases, once the measurement is completed, it may experience a decoherence. In a real sense, we can conclude that most of the universe has not been measured in the quantum sense, so it will meet the definition point of entanglement under the current theory.
Entanglement from zero point
Time zero entanglement means that, in a sense, the momentum of every element contained in the universe also contains the information of original momentum and all the events that cause momentum exchange. From this perspective, we can say that they have been intertwined. This study shows quite strongly that entanglement will not weaken with the structure we call time.