TikTok was aware that its design features are detrimental to its young users and that publicly touted tools aimed at limiting kids’ time on the site were largely ineffective, according to internal documents and communications exposed in lawsuit filed by the state of Kentucky.

TikTok teams identified the harmful effects of its platform on young users but limited preventive measures so as to avoid a drop in traffic, according to internal documents revealed by a United States public radio station on Friday.

TikTok has been aware that its design features are detrimental to its young users and that publicly touted tools aimed at limiting kids’ time on the site were largely ineffective