SAN FRANCISCO (AP) 鈥 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鈥檚 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 criticized Twitter鈥檚 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. Boreing 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.
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Boreing tweeted that Twitter canceled a deal to premiere 鈥淲hat is a Woman?鈥 for free on the platform 鈥渂ecause of two instances of 鈥榤isgendering.鈥" Twitter rules prohibit intentionally referring to transgender individuals with the wrong gender or name.
鈥淭his was a mistake by many people at Twitter. It is definitely allowed," Musk tweeted back. 鈥淲hether or not you agree with using someone鈥檚 preferred pronouns, not doing so is at most rude and certainly breaks no laws.鈥
Irwin tweeted Friday that 鈥渙ne or two people noticed鈥 she left the company the day before, and she noted speculation about whether she was fired or quit. She teased that she would post 24 tweets to explain her departure.
Then she posted that she was just kidding about the long narrative.
鈥淚n all seriousness, I did resign but this has been a once in a lifetime experience and I鈥檓 so thankful to have worked with this amazing team of passionate, creative and hardworking people. Will be cheering you all and Twitter as you go!鈥
Next to Musk, Irwin had been the most prominent voice of the company鈥檚 ever-changing content policies in recent months.
Twitter has struggled to bring back advertisers turned off by Musk鈥檚 drastic changes and loosening of rules against hate speech since he bought Twitter for $44 billion in October. Twitter also has an incoming CEO, Linda Yaccarino, known for decades of media and advertising industry experience, but she hasn鈥檛 started yet.
Irwin and Twitter didn鈥檛 respond to requests from The Associated Press for comment.
Twitter has been in turmoil including mass layoffs and voluntary departures since the billionaire Tesla owner bought the San Francisco company and took it private. The company鈥檚 head of trust and safety left shortly after the takeover, and turnover in the top ranks has continued. Last month, Twitter fired two more top managers.
Elon Musk and Twitter: A timeline
January 31: Musk begins building up his Twitter stake

Musk starts quietly buying up Twitter shares, building his stake in the company. But it would be months before he disclosed this fact to the public.
March 14: Musk's Twitter stake tops 5%

Musk's stake in Twitter tops 5%, but that fact is not disclosed until the following month. Musk was obligated to disclose his stake within 10 days of crossing the 5% threshold, but waited 21 days to do so. During that time, he continued building up his stake.
March 24: Asking whether Twitter should change

The billionaire begins to make pointed statements about the platform from his account. "Twitter algorithm should be open source," he wrote, with a poll for users to vote "yes" or "no."
The following day, Musk tweets out another poll to his followers: "Free speech is essential to a functioning democracy. Do you believe Twitter rigorously adheres to this principle?"
April 29: Musk cashes out billions in Tesla stock

Filings reveal Musk sold $8.5 billion of his Tesla stock in the three days after Twitter board agreed to the sale for an average of $883.09 per share. The filings did not disclose the reason for the sale, but Musk appeared to be raising funds to buy Twitter.