argo-cd: Login attempt fails sometimes after 1.5.3 upgrade

After upgrading to 1.5.3 I’m getting these errors on the first attempt to authenticate via /api/v1/session route after some idle period. It would eventually work if I retry a second or few more times. I did not configure any of the rate limiting and the credentials used to hit the route is the admin user. Not quite sure why this is happening.

time="2020-05-05T16:58:46Z" level=error msg="finished unary call with code Unknown" error="failed to enforce max concurrent logins limit: EOF" grpc.code=Unknown grpc.method=Create grpc.service=session.SessionService grpc.start_time="2020-05-05T16:58:46Z" grpc.time_ms=0.664 span.kind=server system=grpc