Inside possible warning signs that pointed to Angelina Jolie and Brad Pitt's split

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While Brad Pitt and Angelina Jolie‘s divorce came as complete surprise to many, with one source calling it “a complete shock,” there have been some hints of trouble.

The same source notes the former couple “have definitely spent more time apart this year.” In fact, Jolie and Pitt were last seen together in public back in July, while making a stop inside a Los Angeles Jamba Juice store with their daughter Shiloh.

Leading up to their second wedding anniversary in August, the couple had spent a large part of the past couple months apart due to their hectic work schedules.

Pitt has been busy finishing his new films Allied and War Machine, which both shot overseas, while Jolie finished her latest directorial effort, First They Killed My Father.

Jolie has also spent time keeping up with her humanitarian efforts as a special envoy for the United Nations’ refugee agency. In the past year, she spoke out in front of a House of Lords committee in London and led an honorary committee for this year’s Cambodian International Film Festival. Most recently, she advocated for victims of sexual assault in war zones.

In addition to their busy work schedules, Pitt has been spotted jetting off to the former couple’s estate in the South of France several times solo.

WATCH: Angelina Jolie Files for Divorce From Brad Pitt

“Brad has been coming to Miraval every few weeks in season this year,” a source told PEOPLE. “He has been filming in Europe and he’s come in a couple of times, for a couple of days.”

According to the source, Pitt had flown out of Miraval via helicopter when he made his flag waving appearance at Le Mans in June. Most recently, Pitt spent a couple nights at Miraval during the vineyard’s wine harvest in early September, after a solo trip to Croatia, where he took an onsite tour of a proposed $1 billion dollar luxury real estate development on the Adriatic coast.

Despite Pitt’s visits to the French estate, multiple sources told PEOPLE there have been no sightings of Jolie this year, with one source suggesting she may not have visited since beginning of 2015.

FLASHBACK: Brad and Angelina at the 2012 Golden Globes

Jolie filed for divorce after two years of marriage and over a decade together, PEOPLE confirmed on Tuesday. In court documents obtained by PEOPLE, Jolie states that the couple have been separated since Sept. 15.

“I am very saddened by this, but what matters most now is the well-being of our kids,” Pitt said in a statement to PEOPLE. “I kindly ask the press to give them the space they deserve during this challenging time.”

Jolie, through her lawyer, also released a statement addressing the divorce: “This decision was made for the health of the family,” the actress’ attorney said. “She will not be commenting at this time, and asks that the family be given their privacy during this difficult time.”