The official website for the Black Clover announced the expected earlier today. Starting May 5, new episodes of the ongoing adaptation will be postponed due to the ongoing COVID-19 (coronavirus) pandemic.
The statement explains that they continue to put the health and safety of their cast, staff, and other involved parties first. As a result, episodes from 133 and on will be delayed. As for when we can expect the Black Bulls to return, we’ll just have to keep an eye out for announcements on the website.
Source: Official Black Clover website