Mr. Lloyd Webber, 63, chalked up his ambivalence of late to the otherwise happy occasions of recently seeing “the two best productions of my shows that I had nothing to do with”: the revival of “Jesus Christ Superstar” at the Stratford Shakespeare Festival in Ontario, which he hopes will come to Broadway, and a production of “Love Never Dies,” a sequel to “Phantom,” in Melbourne, Australia.

Image Andrew Lloyd Webber with Danielle Hope. Credit... Ken McKay/Rex Features

“Love Never Dies” has been a particularly bittersweet experience for Mr. Lloyd Webber, to hear him describe it during a rare and candid discussion. One of the highest-stakes sequels in history, given the popularity of “Phantom,” “Love Never Dies” coincided with Mr. Lloyd Webber’s treatment for prostate cancer. He said he struggled to write the musical, and his usual role as a hands-on producer was scrambled somewhat by his illness. The show opened in London in 2010 to mostly harsh reviews. A subsequent retooling drew some better notices, but overall negative buzz doomed the production, which will close next month.

While the Melbourne version looks more successful, Mr. Lloyd Webber said he was mindful that he did not have a hand in mounting it. “I just said, ‘That’s the score, do what you can,’ ” he recalled telling the director in Melbourne, Simon Phillips.

“So I’ve now decided what I might do is to have nothing to do with my shows for the foreseeable future, which is probably a very sound idea,” said Mr. Lloyd Webber, who was tanned and relaxed in an open-collared shirt and slacks, and whose tone only now and then turned solemn.

Pressed on this notion of self-exile, he pointed out that he also played no role in Des McAnuff’s mounting of “Superstar” in Stratford, which opened last month to laurels from critics. While Mr. Lloyd Webber holds the rights for a Broadway transfer of the McAnuff production, he said he was inclined to assign them to other producers.