JS doesn't work at first and CF adds utm tags

Whenever I open website for first time, it has problems loading JS script. Once I submit any form like add to cart or newsletter, page reloads and js starts to work, no more console errors. What’s more weird is that page reopens with random utm_term tags as from my fb ads campaign.
I’ve disabled Rocket Loader, Minify JS/CSS, APO and problem still persists.

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