Sometime back I have posted my issue compass. Please have a look into that. Redirect to home page - Compass
Well we do have 4 UI and 4 task. It doesn’t matter how many servers. Issue is coming across all environments. But after adding “noIdpSameSiteNone” it got resolved.
I am not sure in 8.4p1 because I haven’t test it. May be you can give it a try and let us know.