It sounds like this might be a periodic problem: I am not able to make changes to my Hub site today. I created my site a few weeks ago, and I've updated it periodically, but today for some reason my changes aren't saving.
I'm admin. on our site, and I have cleared the browser history. Specifically I'm updating a block of text, which should be super quick and easy. After I edit and click save, it says it does, but if I look at it in a fresh browser it has reverted to my original.
GIS Day 2019
GIS Day is over now and I just wanted my Hub site to reflect that it was in the past because I started sharing this with everyone who couldn't be there that day.