Weird Session Timeout Behaviour with SSO / SAML Configuration

Hi all,

Has anyone seen any weird behaviour with session timeouts when using SSO to access Appian? We're on 17.1 with a session timeout of 20 min in the Admin Console and web.xml has a timeout of 65 mins, yet some people are being logged out after 15 mins, others don't seem to get logged out at all (particularly those who log into Appian directly, not through SSO). Our SSO sessions time out after 1 min.

Is it possible that session timeout settings are cached somehow? Anyone know why we might be seeing this behaviour?

Thanks,

Caz