However a source close to Harry has now said that the prince "is getting regular updates and is aware of everything that is happening".
Lady Diana's brother Earl Charles Spencer also asked BBC to further investigate the matter.
At the time of the interview, Diana opened up to Bashir about her marriage to Prince Charles, his affair with now-wife Camilla Parker-Bowles and her eating disorder.
Citing the sourc, Reuters said, prince Harry has joined his brother William in welcoming a new investigation into how the BBC secured a famous and controversial 1995 interview with their mother Princess Diana. It should help establish the truth behind the actions that led to the Panorama interview and the subsequent decisions taken by the BBC staff at the time.
"You don't have to make a public statement to imagine how he is feeling personally, people know how much his mother means to him".More news: Top TikTok star Charli D'Amelio loses 1m followers
People seem to be taking issue with the fact that Harry has remained silent, but a source close to him is slamming those who are trying to "drive a wedge" between the brothers.
The network plans to investigate whether or not the speculations that Martin Bashir coerced Diana into participating in the interview is true.
Prior to this, Prince Williams publicly addressed BBC's investigation into the 1995 tell-all interview.
Although fans love the season, the same can not be said for Prince William and the royal family, who have a long history of disapproving of the series and its portrayal of their family. "He has spoken out bravely in the past about loss and grief, and the vast impact it has had on him".
The BBC announced Wednesday the immediate start of an investigation led by Lord Dyson, a former senior British judge, into the events surrounding the interview.More news: James hopes to build on his worldie for Wales
The spokeswoman added: "Clearly, if anyone submits new evidence - or the investigation needs to go to particular places - then Lord Dyson will be able to consider that appropriately".
Diana, who would divorce Prince Charles the heir to the British throne in 1996, detailed the pair's collapsing marriage in the BBC programme. Diana and her boyfriend Dodi Fayed were killed in a tragic vehicle crash in a Paris underpass on August 31, 1997, along with their French driver Henri Paul as they tried to outrun chasing photographers.
In a statement they said: "Following the announcement of the independent investigation, the BBC has now recovered the princess's original handwritten note".
Bashir has made no public comment on the situation and the corporation says the journalist, who gained global renown from the interview, is now on sick leave, recovering from heart surgery and from contracting COVID-19.More news: Watch SpaceX launch a satellite that will monitor the world's oceans