Yes, it’s odd the way you need to uninstall it from within the Mixed Reality Settings area.
I also downloaded the specific update package from Microsoft Update Catalog as a standalone installer to install it that way as Windows Update itself was having problems.
Once I did that, I re-ran Windows Update, which said it was installing the troublesome update again (I don’t think it did, but it said it was successful) and then I was back up to date with patches.
Plug in G2 after that and let the Mixed Reality pieces install themselves and all good.