The source added that Clare and Dale's relationship "didn't end well," suggesting they are currently not on amicable terms.
The couple reportedly couldn't agree on multiple significant relationship issues, including what state they wanted to live in and how soon they wanted to begin having children.
After Clare and Dale got engaged on The Bachelorette's sixteenth season last year, they announced their breakup in January 2021, only to begin seeing each other again and going on dates the following month.
Dale confirmed in an April 7 Instagram selfie that he and Clare were back together, and the pair proceeded to celebrate their one-year anniversary in July -- but it appears their reconciliation was short lived.
An insider also confirmed the news of Clare and Dale's recent breakup with E! News.
Rumors have been swirling for days Clare and Dale broke up for the second time because they haven't been spotted in public together, and Dale even appeared to celebrate his 33rd birthday on September 24 without the former The Bachelorette star.
Clare did not publicly wish Dale a "happy birthday," nor did she "like" or comment on his own birthday post.
Dale also reportedly attended Fashion Week events and a recent Coldplay concert at the Apollo sans Clare.
And Dale saw a screening of the new movie Dear Evan Hansen at the Whitby hotel with a group of male friends, The Post reported.
In addition, Dale also attended the September 19 wedding of a friend by himself even though Clare had also been invited as Dale's guest, according to Us Weekly.
More than two weeks have passed since Clare and Dale lasted posted anything about each other on Instagram, and they are typically very vocal about their romance and whereabouts.
The last Instagram post of Clare and Dale together dates back to September 10, when Clare shared a slideshow of photos from the U.S. Open tennis tournament, one of which featured Dale by her side along with fellow The Bachelorette couple Katie Thurston and Blake Moynes.
Earlier this summer, Clare and Dale's relationship seemed stronger than ever. They had even been spotted wearing matching rings.
"They are engaged again, but a second proposal did not happen," a source close to Clare told E! News in July. "Clare has been wearing her ring for months and put it back on once Dale stepped up and they decided to give their relationship another shot."
"It's more of a promise and commitment from Dale and there's no wedding planning at this time," the source added.
"They had a conversation over a month ago about their future and decided that they wanted to be engaged again... They aren't rushing anything and aren't even living together permanently yet."
An insider also told Us Weekly at the time that Clare and Dale were "happy" together and very much in love.
Dale has been living in New York City while Clare has been holding down her fort in Sacramento, CA, where she takes care of her mother suffering from Alzheimer's.
Clare's journey on The Bachelorette's sixteenth season in 2020 ended prematurely after about two weeks. Producers planned a steamy overnight date for the couple and then Dale proposed marriage seemingly the next day.