Have noticed another quirk in web version, probably after some recent update. In My Day if you set a reminder or due date it hides the steps panel. So i now need to click more to set a due date and a reminder in one go. And just in general, i have a wide screen, i don't need it to hide, i want side panel to be always available. What is more weird, it only does that in My Day. In Tasks the side panel doesn't hide.
Outlook team treats their web version as a first class citizen and often new features get there first. In To Do this is opposite. Web version is clunky and buggy. Truncated steps text, not able to copy part of the text in steps (it starts to drag them), painful way of dragging and reordering steps and tasks.