Membership plan checkout stops when Signup is triggered

Hello, I am in need of some help. When a membership plan is selected, the checkout process triggers the signup for users not already logged in but doesn’t reload the page on successful signup (using default signup) which stops the checkout process and leaves the user hanging without a way to enter their payment information until the user manually reloads.

I have tried reloading the membership plan selection page which doesn’t work. I tried using the onLogin function to no avail. I have also tried both of these attempts on the master page as well without success. Is my only option to switch back to a custom signup?

Thank you,
Yasemin