I think I've understood the steps you're using. I suspect you pulled the official image from Docker as:
docker pull jenkins
docker run --rm -i --publish 8080:8080 jenkins:latest
That seems perfectly reasonable to me, and I confirmed that (as you said) it is running Jenkins 2.32.3.
I believe Carlos Sanchez (and others) control the publishing of official images to that location, but I'm not 100% sure of that. The 2.32.3 image was pushed to that location only 3 days ago, so I'm not sure of the general plan for delivering new LTS releases to the official Docker image.
Mark Waite