It's like when you're at a rave, having the time of your life, and someone turns off the music. Not cool, man.
But seriously, it's a real thing in quantum mechanics where entangled particles start to lose their entanglement.
Want to learn more? Quantum Entanglement
Or maybe Quantum Entanglement Theory is more your speed.
We're not really sure what causes it, but it's probably something like Quantum Decoherence Urban Legends.
There isn't one. But you can try Quantum Decoherence Treatment (results not guaranteed, side effects may include: reality distortion).
Or, you know, just accept it and move on with your life. Like, it's not the end of the world or anything.