Zara Tindall, Princess Anne’s daughter, had been worried about her mother’s demanding schedule even before the royal was sidelined by a recent horse-related injury.

On June 24, the palace made an announcement that 73-year-old Princess Anne had sustained minor injuries and a concussion following an incident at the Gatcombe Park estate in southwest England.

Her medical team indicated that her head injuries were consistent with an impact from a horse’s head or legs. This incident made her suffer from temporary memory loss.

“For the last several years, Zara Tindall has been worried that the palace has been relying too heavily on her septuagenarian mother,” Christopher Andersen, author of “The King,” told Fox News.

“She has a point,” Andersen added. “Princess Anne is routinely described as the hardest-working royal, racking up 457 engagements last year alone. She has always been fondly thought of as inexhaustible — even invincible. When Zara saw her mother lying in a hospital bed suffering from a severe concussion and memory loss, she was understandably shaken.”

“Only so many shoes can drop before the institution of the monarchy itself begins to look awfully shaky,” Andersen continued.

Following Anne’s accident, changes were made to The Royal Diary part of the royal family’s website, which chronicles official engagements. “The diary on @RoyalFamily website has been updated to remove Princess Anne’s engagement next week, as she is still recovering from her accident last month,” according to Gert’s Royals.

According to People magazine, Anne’s next scheduled outing is set for July 15 and 16, where she is expected to visit the NLV Pharos ship off the west coast of Scotland as Patron of the Northern Lighthouse Board.

A source previously told OK! magazine that Anne’s injury had left her daughter “shaken to the core,” adding, “She’s desperately hoping this memory [loss] is temporary. This has been a huge wake-up call for everyone in the family, and they’re rightfully distressed.”

On June 28, Princess Anne was discharged from the hospital and is expected to make a full recovery, although details about her return to royal duties remain unclear.

“Princess Anne is quite stalwart and will be resolute in returning to work as soon as she can whilst taking the advice at the same time of her medical team,” royal expert Ian Pelham Turner told Fox News. “It certainly has caused issues for the royal family as Anne has a daunting record in the number of events she attends each year. It’s just another headache for King Charles trying to create his version of a slimmed-down monarchy, whilst covering all the diary events each year.”

Vice Admiral Sir Timothy Laurence, Anne’s husband, provided an update, saying, “She is recovering well, thank you. We are both profoundly grateful to the medical team and hospital support staff for their expert care — and to the emergency services who were all so wonderful at the scene.”

He added, “We are both deeply touched by all the kind messages we have received from so many people near and far. It means a great deal.”

For the royal family, Anne’s incident is the latest health scare. Previously, people were concerned about King Charles and Kate Middleton‘s cancer treatments . This has strained the family’s ability to maintain their public engagements, with Anne and Queen Camilla stepping in to cover more events. As a result of her injuries, Anne had to cancel her appearance at a state dinner in honor of the emperor of Japan.