It seems to be that way but maybe someone will popup with another take.
Edit: "zeeone" mentions other than M$ branded in his post.
That assumption is correct for me and FWIW I've always chosen to use a keyboard that's actually listed in the hope of avoiding problems. I'm not certain personally that it's confined to M$ keyboards as my Ortek and Cherry keyboards behave in a similar way.
Incidentally and as I feel confident some people will know, a person only needs to "take a peek under the hood" so to speak and discover that there are errors galore in what appears otherwise to be a 'functioning well' M-11, akonadi for instance springs to mind as an obvious example. It's probably also true for other distro's. They all have errors but function.
I can't be sure that the keyboard and it's interactions are error-free operations and have simply reverted to manual operation of NumLock for the time being.