For the Magicians, the cause of the time loop was fucking hilarious.
Spoiler below!!!
The destruction of Earth lead to the breaking of a magic seal meant to hold an Eldritch being. Whales made this seal long ago, and whenever it breaks, it reverses time so that the breaking is undone. Whales are OP wizards.
You can just tailor what you want to see. That's the point of having internet on your TV.