I experienced the exact same issue with my dev environment running on CAS 5.3.5. Unfortunately, I'm far less capable of digging deeper into it than you. I'd recommend to open an issue on Github.
-- - Website: https://apereo.github.io/cas - Gitter Chatroom: https://gitter.im/apereo/cas - List Guidelines: https://goo.gl/1VRrw7 - Contributions: https://goo.gl/mh7qDG --- You received this message because you are subscribed to the Google Groups "CAS Community" group. To unsubscribe from this group and stop receiving emails from it, send an email to cas-user+unsubscr...@apereo.org. To view this discussion on the web visit https://groups.google.com/a/apereo.org/d/msgid/cas-user/22071656-bc3b-4f4d-9553-c037d83f8805%40apereo.org.