The European Union is ramping up pressure on Meta to make big changes to Facebook and Instagram after the European Commission preliminarily found that features like autoplay, infinite scroll, and highly personalized content recommendations were addictive.

On Thursday, the EC said its investigation indicated that “Meta did not adequately assess the risks of its addictive design on the physical and mental wellbeing of users, including minors and vulnerable adults.”

“These features fuel the user’s urge to keep scrolling and shift the brain into ‘autopilot mode,’ contributing to unhealthy habits and compulsive use,” the commission said.

Over the next few months, Meta will have an opportunity to dispute the claims, and it has already taken a defensive stance. Meta’s spokesperson, Ben Walters, told Reuters that Meta disagrees with the commission’s preliminary findings, which supposedly “don’t accurately take into account the significant steps we’ve taken to protect teens.”

“Since this investigation began, we rolled out Teen Accounts that automatically protect teens and put parents in control—allowing them to block access to Instagram at night ‌and cap ⁠daily screen time at just 15 minutes,” Walters said.