Back arrow after succesful login/redirect to our web application

[Stein, Eric]

We noticed that when we hit the back arrow on a browser after a successful login/redirect to our web application, we get sent back to https://cas.locusfocus.com/idp/profile/SAML2/Redirect/SSO, which renders as an error page:

ERROR
An error occurred while processing your request. Please contact your helpdesk or user ID office for assistance.
This service requires cookies. Please ensure that they are enabled and try your going back to your desired resource and trying to login again.
Use of your browser's back button may cause specific errors that can be resolved by going back to your desired resource and trying to login again.
If you think you were sent here in error, please contact technical support
Error Message: Error decoding authentication request message

We're using shibboleth as IdP and SP, with CAS under the IdP hood. Is there any way to change this behaviour? I guess we'd like it to redirect right back to our application page, but I'm open to other ideas as well.

Thanks,
Eric