Oh no, I feel stupid! Thanks for the hint, I was able to resolve it. Not sure how the shortcode itself got into the “code” style, but recreating the paragraph indeed resolved this.
Hi @takayukister, I agree with @dgowaty that it would be more intuitive for the plugin to create the submit button as a default WordPress Button block, or at least give it the “wp-element-button” class. That way, users can easily style the button through the normal site editor instead of having to manage button styles twice. I’d love to hear your opinion.
Thanks!