One of the two co-presidents of Fox Animation, which became a Disney property with the company’s $71.3 billion acquisition of most of the assets of the former 21st Century Fox, is stepping down.

According to The Hollywood Reporter, Andrea Miloro is exiting. The other co-president, Robert Baird, is expected to remain on the job.

“Miloro, who had been in the role for 21 months, had direct oversight over Fox-owned Blue Sky Studios, the Greenwich, Conn., animation studio behind the ‘Ice Age’ and ‘Rio’ movies,” THR reports. “She splits her time between Los Angeles and Connecticut.”

The report quotes an email sent to Blue Sky employees Thursday morning in which Miloro says: “I am writing today with some news that is difficult to share, but I wanted you to hear it from me: I will be leaving Blue Sky.”

THR adds: “Miloro’s tenure at the helm of Fox Animation had been a rocky one. She was the subject of human resources inquiries at Fox regarding unprofessional behavior.”

The report also notes that Blue Sky’s “Spies in Disguise” movie “has had its release date pushed twice and seen its budget balloon. The pic is currently scheduled to open Christmas Day, five days after Disney’s ‘Star Wars: The Rise of Skywalker.'”