Having the same issue! Thought the integration with Microsoft To Do was awesome especially with Bixby, but a big letdown when I noticed the synced To Do tasks won't show on my Active 2 anymore. Would love to get a fix or workaround for this, because I use reminders on my watch all day.
The whole set up doesn't make sense. I only need the one list. I want to set reminders/to do things I can read at home and my phone after I am away from them, not spend endless time between moving between two lists . I want to be able to see it on my phone, watch, and desktop but you cannot see reminders on your desktop. You have to physically move the list but if you do that you cannot see it on your watch anymore. This is frustrating because there are no other options.