When submit task, validation doesn't work

Question

Dear experts, 
 I have a PM with user input task, in task form, I define one submit button, which submit is true, validation is true, in this task form, it have a child interface, which have a paragraph field which required is true. However when I keep this paragraph field as empty and press the submit button, user input task completed, PM completed, no validation here. What maybe the possible reason here?

Mike Schmitt · Answer

Can you show a screenshot of what the form looks like when this behavior happens? The code snippets look correct unless there's some unusual configuration involved that isn't being shown. As long as the paragraph field is visible on the form when "submit" is clicked, and it's marked as required, and has an empty value (like true null or zero characters, as opposed to a single space or something), then the validation condition *should* be firing and preventing form submission. But it's hard to tell whether something else unusual might be interrupting this normal configuration.