Embedded form doesn't submit when using invisible Google reCaptcha

I just posted this on website, https://pianoartisans.com/about-piano-artisans/contact-us/

When you fill out the form and press submit, there is no confirmation box or anything that confirms that you submitted the form successfully.

Please advise. 

Thank you

I can see that you embedded the form using the script embed method.

Could you please try using its iframe code instead to embed the form? Please refer to this guide on Getting-the-Form-iFrame-Code.

After doing so, please try making a test submission and see if it will submit.

Worked perfectly. Thank you