How did a 34 GB update happen? Is this normal?

I was playing the game last night for a few rounds just fine. Nothing unusual about the games at all. I call it a night and close down the game, turn off my computer, and go to bed.
Today I get back home from work. I turn on my computer and am greeted by steam with a 34 GB update for Dead by Daylight. Thats nearly the entire game. And steam is telling me that it's an "update."

Is this from the update to unreal engine 5?

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