Adobe Target VEC - Immediately logs out of secure app

Hello.

Recently, the Adobe Target VEC has been having issues displaying our secure single page app. I am able to log into the secure app, but then I am immediately logged out with a message saying that my session has timed out.

I have tried:

1. Turning off the EEC

2. Running the Requestly "Remove X-Frame-Options" header modifications.

I believe that this behavior is caused by the secure app being opened in the VEC iframe. Does anyone have other suggestions that I could try? The app team isn't very helpful.

Is there something that I could look at in Chrome Developers Tools to find out what is causing the session to immediately time out and log me out?

Thanks,

Keith