sort by date, priority and name is not working. It is reordering stuff alright, but in an incoherent manner and, worse yet, I can't now get it back to the way I had it originally. I use Chrome.
Could you send a screenshot to firstname.lastname@example.org of how your task list looks after sorting by date or one of the others.
Also, please try clearing the cache for Chrome. (3 Dots, Settings, Show Advanced Settings, Content Settings, All Cookies & Site Data, search for Todoist)