Site doesn't redirect to the right page after login in Chrome

My site acts differently on Chrome and I haven’t been able to figure out how to fix it. There’s an S2member log in widget on the home page. When you log in (Chrome browser) it take you to the membership sign up page instead of the Welcome page. If you’re logged in and click ‘my account’ it then takes you back to the membership sign up page instead of the correct (Welcome) page. It only does this with Chrome.
In other browsers it works as I want it to; once you log in you go to the Welcome page and if you click My Account after logging in it takes you to the Welcome page as well.
I’ve been trying to figure this out for hours and I don’t know what else to try at this point.
If anyone knows why it’s doing this only in Chrome and how to fix it, I’d really appreciate it.