[keycloak-user] Unable To Use Refresh Token

Hello, I've deployed keyclock 2.4.0 in a kubernetes environment. While refreshing the access token I'm getting following response. {'error': 'invalid_grant', 'error_description': 'Client session not active'}. Here is what I did: Step1: First, I generated three access tokens and refresh tokens (rf1,rf2,rf3), then I used this refresh_tokens to refresh the access tokens. I got the access tokens successfully for all three requests. (Successful scenario) Step2: I restarted some of the pods from the keyclock cluster, I tried to refresh the access tokens using the same refresh tokens(rf1,rf2,rf3) again, using rf1 I could refresh the access token but using rf2,rf3 I got the response mentioned above ('client session not active'). I made sure rf2 and rf3 are not expired. I'm unable to use refresh token even though it is not expired. I suspect session created on one pod is not properly shared between all the members of a cluster and I'm loosing the session if one of my pod is restarted or goes down. Can someone please suggest any solution for this? Any help would be greatly appreciated. regards, -Sagar