F5 as IdP for Adobe Enterprise?

I'm hoping that someone out there has setup an F5 as the IdP for Adobe Enterprise. I have been trying to make this work and not had any luck so far. I have setup several other SAML/SSO instances with our F5 and this is the only one i've not been able to get working. Adobe says that data is never even leaving our IdP and that the issue is with our F5. I have a case open with F5, but they say that support is limited to break/fix and not assistance with new configs.

Anyhow, here's where I am: Configuration setup completed in Adobe Admin Console, download Metadata file from there and then configured the setup in F5 using Guided Configuration. I believe I have all the data entered correctly. I can go to Adobe (they only support SP initiated sign-on), get redirected back to my IdP, successfully auth at my IdP page, then I get a "Secure Connection Failed" "PR_CONNECT_RESET_ERROR" in Firefox.

Any help would be appreciated. Thank you.