I've been working with Nintex Forms (2016, classic forms) and have noticed that the validation rules, applied to any controls in the form, are not firing after deleting the row(s) in the repeating section with people picker control in it. Is it a bug?
@Jekaterina can you provide a screenshot or be a bit more specific.
If you delete a row or control, the rule may become misconfigured in some way and therefore not firing as expected. It's hard to say without more details, but you may have to redo your rule if you delete something on the form.
Please see the screenshot: the rule is applied to the controls in the first section of the form (1. Training info). The list columns are not required and conditional validation rule is applied to the controls as the form can be submitted as Draft without validation.
Below - 2 repeating section controls. First rep. section (2. Internal participants) has a people picker control in it, while the second (3. External participants) only textboxes.
The validation rule is firing properly when rep. sections are empty or rows were added. Also there are no issues when deleting the rows from the second repeating section. However, after deleting the row(s) from the first repeating section, the form saves and closes without firing the validation rule.