Page keeps redirecting after first redirection

The setup for behavior is as follows:

After Subscriber Subscribes:
==============================

REDIRECT ON SUBSCRIBE (OPTIONAL)
Specify a URL to redirect to after a visitor has successfully subscribed.

http://www.example.com/plans

When this option is setup then redirection goes to the desired page. But the problem comes when the user wants to go back to the main page, the redirection stays.

I’ve found out that this is because there is a cookie being created in the redirection that is not expiring and setups the redirection.

Any help configuring this? I would appreciate any input. Best.

https://ww.wp.xz.cn/plugins/mailmunch/