Hi Pernilla,
Please make sure you enabled Conditional Logic on Submit button https://docs.gravityforms.com/submit-button/
I kindly request you to conduct a check by activating the default WordPress Theme, such as Storefront or Twenty Twenty-Three (Appearance > Themes) and keep WoodMart Core and WooCommerce plugins activated. This is to ascertain whether the issue you are experiencing is due to our theme or not.
If the problem persists even with the default WordPress theme, it would suggest that WoodMart theme is not the cause of the issues.
Regards,