CDC Claims They Didn't Know The Covid Vaccines Caused Heart Inflamation?

Article States: CDC officials made the claim, which is false, in response to a Freedom of Information Act request for reports from a CDC team that is focused on analyzing the risk of post-vaccination myocarditis and pericarditis, two forms of heart inflammation. Both began detected at higher-than-expected rates after COVID-19 vaccination in the spring of 2021.
https://www.zerohedge.com/covid-19/cdc-claims-link-between-heart-inflammation-and-covid-19-vaccines-wasnt-known-most-2021
https://www.fda.gov/media/143557/download