Despite not speaking to each other or engaging in any public engagement at the Platinum Jubilee, Prince Harry disappoints Prince William. 

According to the Sunday Times, the future king's damaged feelings may have contributed to his refusal to interact with her younger brother at the time. 

Though Prince Harry and Meghan Markle went to the UK for a brief visit to mark Queen Elizabeth II's 70th year on the reign, sources suggest that the Duke and Duchess of Cambridge did not speak to their Sussex in-laws or even make an attempt to introduce their children to Lilibet Diana. 

Last Friday, Prince Harry and Prince William attended the Thanksgiving Service at St. Paul's Cathedral, although they were sitting far apart. 

Senior royals were situated in the first row, while those who were not on the front line sat in the second row.

A royal acquaintance has argued that Prince William hasn't recovered from how much Prince Harry upset him when he left his royal duties to establish a new life in the United States with his family, Meghan, and their children, Lili and Archie.

"He's still genuinely unhappy about it and feels let down," they told the site, "but he's moved on." 

Prince William was "very concerned about having all of the family there and what everyone would think." 

Despite the evident difficulties between the two couples, Prince William was said to be glad that the media was focused on Queen Elizabeth II, Prince Charles, and the Cambridge children's antics. 

"That made him happy," they added. 

READ ALSO: Prince Harry, Meghan Markle Blasted For Releasing Lilibet Picture A Day After Platinum Jubilee

According to royal writer Christopher Anderson, the Duke of Cambridge was not the only one dissatisfied by the Duke and Duchess of Sussex's decision. 

The writer admitted that Queen Elizabeth II's unwillingness to be photographed with Lilibet had a significant impact on the pair. 

"We now know that the Queen, well, the guys in grey who control things, would not enable the Queen's portrait to be taken with Lilibet," he said on the "Royally Us" podcast.

"That spoke a lot, and it was a tough pill for Meghan and Harry to take." 

Archie, their first child, was photographed with the Queen, Prince Philip, and Doria Ragland when he was two days old, as was customary. 

This was not the case for Lilibet.

READ MORE: Why No Photos of Queen Elizabeth II, Lilibet Diana Were Released After Private Meeting