Hi,
I’m sorry to hear that you are experiencing this.
What version of reCaptcha is being used within your form? Is it a reCaptcha v2 field or is the reCaptcha v3 Action being used?
Does the issue persist when temporarily disabling other add-ons and momentarily switching to a default WordPress theme?
The “Health Check and Troubleshooting” plugin can be used in order to test your site without impacting any site visitors.
If the issue persists, can you reach out to our support team so that we can investigate the issue?
You can reach out to our team here: https://ninjaforms.com/contact