principal is null

[taeun0]

Following link https://pivotal.io/security should be used to report security related issues

Expected behavior

Actual behavior

I am using spring-session-data-mongodb.
But sometimes, there is a null of princial data in mongo collection.

Is it normal condition?
I just followed document. https://docs.spring.io/spring-session/reference/guides/boot-mongo.html

Steps to reproduce

Reactor Netty version

JVM version (e.g. java -version)

OS version (e.g. uname -a)