And according to an Us insider, Katie and Blake did not call it quits for any "bad reason."
"They just couldn't make the long-distance [relationship] work," the insider explained, adding, "[Katie] didn't want to put on a facade if they truly weren't on the best terms."
Katie just moved into a new San Diego, CA, apartment in August, and Blake -- a wildlife manager who lives in Toronto, Canada -- often travels to Africa for his endangered-animal conservation efforts, most recently involving the rescuing of rhinos.
"Katie really missed Blake once he left and they would get into little arguments, but at the end of the day, Katie wished he would be with her more," the insider shared with the magazine.
During the interview, Katie -- who originally competed for Matt James' heart on The Bachelor's 25th season -- had sounded somewhat indifferent about her relationship with Blake, who had competed onThe Bachelorette's sixteenth edition in 2020 before joining Katie's season several weeks later.
"We're figuring it out," Katie had said. "We don't know. This is very new to us still. I'm just focusing on myself, he's focusing on him, and if we work doing that, great."
Katie had added she was most looking forward to a time when she and Blake could stop "traveling back and forth" and stated she'd like to settle down with Blake "eventually."
The couple's breakup may have shocked many fans because less than two weeks ago, Katie had taken to Twitter and clapped back at speculation she and Blake had broken up.
On October 15, Katie tweeted a screenshot of one of her recent Instagram comments that read, "You and Blake are not liking each other's posts. Is all OK?"
The screenshot showed that Katie immediately responded to the fan, "Yes," with a tears-of-joy emoji.
Katie tweeted alongside the image, "Imagine your fiance has been on his [Instagram] stories for weeks in Kenya working his ass off and yet this is what some people notice," in addition to another tears-of-joy emoji.
One of Katie's followers wrote, "But 'liking' posts = love I thought," to which Katie replied in a snarky manner, "I guess that's love in 2021."
But when Blake left for Africa to focus on saving animals, Katie reportedly wrote on Instagram earlier this month, "It can feel lonely moving to a new state... I've had trouble sleeping lately... I'm still trying to navigate this new life and city while seeking normalcy."
Katie and Blake had said they were in no rush to wed and intended to travel together and learn more about each other's backgrounds, interests, hobbies and hometowns before deciding on an "anchor spot," or city in which to put down roots as a couple.
"I don't think people fully understand what it's like to date someone from another country and the rules behind that and the visas behind that," Katie said in a series of late-August videos posted to her Instagram Stories.
"I think right now Blake can only be here for 60 days before having to go back to Canada. So we really do have a lot we have to look into -- and we just haven't yet."