Netflix hit Stranger Things may be coming back for a third season, but Life & Style has learned that the offscreen couple of stars Natalia Dyer and Charlie Heaton is over.

“Charlie broke it off with Natalia,” a source exclusively tells Life & Style. “She’s heartbroken. She doesn’t know what went wrong.”

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As Life & Style reported, Charlie, 24, and Natalia, 21, started dating in October 2016, a year before they went public with their romance. Charlie landed in the headlines in October when he was detained at LAX, reportedly because of traces of cocaine found in his luggage, but that didn’t derail his romance with Natalia.

Then in February, Charlie ended things with her and started bringing his sister, Levi, as his date to industry events. “Charlie’s been out partying with his sister, and that’s a kick in the teeth for Natalia,” the source adds. “She’s basically been pushed aside without a second thought.”

For more updates on all your favorite Stranger Things stars, pick up the latest issue of Life & Style, on newsstands now!