Now that we’ve enjoyed the good news about Fire Force season 2, it’s time to move on to the bad news about Haikyu!! To the Top‘s second cour. The continuation of the volleyball saga’s fourth season was scheduled to arrive this July, but the ongoing COVID-19 pandemic has forced the production to be postponed.
Safety concerns were cited in the production committee’s official announcement. A new broadcast date will be announced when a decision has been made.
— アニメ「ハイキュー!!」 (@animehaikyu_com) May 22, 2020
Source: Official Haikyu!! Twitter