[keycloak-user] User sessions in DB

Hello, I'm using Keycloak docker image for 4.8.1 I have logged in users, but in DB, I see no entries in user_session. Additionally, after some time server run, I've got NPE in RealmAdminResource.getClientSessionStats:614 when trying to navigate to Sessions position in Menu in Admin Console. Are there any issues with JPA cache? Best regards, Lukasz Lech