Comment by ktosobcy

You gave example of nvidia and not ubuntu itself. What's more, you are referring to devel(opment) version, i.e. "1.0-devel-ubuntu20.04" which seems like a nightly so it's expected to be overriden (akin to "-SNAPSHOT" for java/maven)?

Besides, if you really need utmost stability you can use image digest instead of tag and you will always get exactly the same image...