I'm watching a TV series and every time I start it (through the Xbox app) it forgets that entire series/season unless I save the season. And even if I save it, it will jump me to the latest episode that I started rather than the one I was watching when I quit.
Edit: also, I've long had a pet peeve with AWS, where they will gladly let you walk through all the steps for setting up an EC2 server before saying "oops, you don't have permission to do that".