SAN FRANCISCO (AP) — A top Twitter executive responsible for safety and content moderation has left the company, her departure coming soon after owner Elon Musk publicly complained about the platform’s handling of posts about transgender topics.

The departure pointed to a fresh wave of turmoil among key officials at Twitter since Musk took over last year.

Ella Irwin, Twitter’s head of trust and safety, confirmed her resignation in a pair of tweets late Friday. She did not say in the message why she was leaving, but her departure came shortly after Musk criticised Twitter’s handling of tweets about a conservative media company’s documentary that questions transgender medical treatment for children and teens.

Musk was responding to complaints by Jeremy Boreing, co-CEO of the media company, the Daily Wire. Boring said in tweets and retweets of conservative commentators Thursday that Twitter was suppressing the movie by flagging posts about it as hate speech and keeping the movie off lists of trending topics.

Boring tweeted that Twitter cancelled a deal to premiere “What is a Woman?” for free on the platform “because of two instances of ‘misgendering.’” Twitter rules prohibit intentionally referring to transgender individuals with the wrong gender or name.

“This was a mistake by many people at Twitter. It is definitely allowed,” Musk tweeted back. “Whether or not you agree with using someone’s preferred pronouns, not doing so is at most rude and certainly breaks no laws.”