The picture, captured at Balmoral in August 2022, came under scrutiny by Getty Images following the Princess' admission of editing a Mother's Day image with her three children.
Buckingham Palace released it on April 21 the previous year to commemorate what would have been the late Queen's 97th birthday.
Getty's spokesperson mentioned that they had reviewed the image and added an editor's note acknowledging the digital enhancement.
Upon closer inspection, various inconsistencies were observed, such as a mismatch in the tartan of the late Queen's skirt and anomalies like a dark shadow behind Prince Louis and a black patch near Prince George's collar.
Additionally, digital repetition in Mia Tindall's hair was noted.
Following the much-debated Mother's Day photo, which multiple news agencies withdrew due to extensive manipulation, this recent revelation has added to the Princess’ distress.
Both the Princess and Prince William aim to shift the focus back to their duties amid the ongoing controversies.
The Princess had shared the Mothering Sunday photo to reassure the public of her well-being post-surgery; however, it inadvertently fueled speculations about her health.
In response, she expressed regret for any confusion caused by the picture in a statement shared on X (formerly Twitter).
Concerns about the Princess's health escalated to the extent that media reports tracked her movements, even highlighting her visit to a farm shop in Windsor.
The disclosure of another edited photograph by the agency might raise further questions about the authenticity of previous family portraits shared to mark special occasions.
The family portrait of Queen Elizabeth II captures a heartwarming scene with her grandchildren and great-grandchildren gathered around her on a green sofa at Balmoral.
Notable absentees were Prince Archie and Princess Lilibet, children of the Duke and Duchess of Sussex, who reside in California.
Getty exclusively retains the image in its library, as other agencies no longer possess it beyond a designated usage period.
A note on the Kensington Palace's profile clarifies that the photo has been digitally altered to create a composite illusion, emphasizing that no one was inserted post-production.
For inquiries, Kensington Palace declined to provide a response.