Bloomberg:

Kevin Systrom and Mike Krieger, who have been at the company since Instagram’s acquisition by Facebook in 2012, had been able to keep the brand and product independent while relying on Facebook’s infrastructure and resources to grow. Lately, they were frustrated with an uptick in day-to-day involvement by Zuckerberg, who has become more reliant on Instagram in planning for Facebook’s future, said the people, who asked not to be identified sharing internal details.

I’ll take “Things Which Suck, But Aren’t At All Surprising" for $500, Alex.