wordpress editor update button not working all the time

If I spend more than a few minutes editing a post, the Update button becomes unresponsive. Nothing happens when I click on it. There is no error message, and it accomplishes nothing. It behaves similarly to a greyed-out button, although it is of regular colour.

When I create a new article, the same thing happens with the Publish button. The button will be disabled if I do not publish the article before filling in all the superfluous information.

I’m using the Block Editor and the latest version of WordPress.