Hi Long,
I changed the theme and deactivated all of my plugins except the ones needed to login and take me to the frontend form. This included elementor pro, meta box aio - and action packs. I use action pack to help me login. However, when I disabled this and used the WP login, and was taken to the backend user profile - it worked. So I am not sure if it is a conflict with the plugin, or a conflict when the user goes to the frontend form first, and it is not auto-populating..
How would I solve for both scenarios?
Thank you!