Does this only happen with certain configurations or something? I've been using Windows 10 since it came out and can't really remember this happening to me
As far as I'm aware this has to do with the fact that major updates are being delivered in a manner that's basically equivalent to a full reinstall, causing a lot of settings to get reset to defaults. This update method is particularly common for the insiders, but still happens from time to time on the general builds: anniversary update, creator's update and such.
Makes sense.
Makes sense for people who want nightlies and constant flux. Makes absolutely zero sense for production machines.
No idea; I am not MS's QA, and only have a handful of configs. Plus it doesn't even happen consistently on the configs that I do have.