I think commits (git diff 11.0.2 11.0.3) is about the only way… changelog does not have much detail.
I have observed behavior change in 10.0.2 and slightly different again in 11.0.3 based on when Keycloak IDs (UUIDs) change during LDAP sync. Not sure if this is a config issue (running same config across upgraded versions, but might need adjustment I don’t understand), a bug, or a design intent but it broke some of our apps.