Do not use it so can not tell you if if happened to me but the OS version gets set by the base-files package. Specifically the /etc/debian_version and /etc/os-release contained in it.
They need to update their base-file package, which is modified from the stock Ubuntu one to change the name to “KDE neon”. It looks like Ubuntu updated theirs (to reflect their recent update to 24.04.2) which ‘upgraded’ the existing neon version.
It happens every once in a while, I will assume a quick fix will be forthcoming.
Actually, it looks like /etc/os-release has two “PRETTY_NAME” lines instead of one, so the neon line was added to the file as opposed to replacing the Ubuntu line:
It’s great to see this being fixed so quickly. The reason I was so concerned initially is that usually when Neon reports being Ubuntu it’s a sign that repositories have been messed up or pinning is no longer working correctly.