I keep having a recurring issue with my scheduled run for the day (almost always my Thursday run) disappearing from my watch under my Scheduled Workouts. It will be loaded on my watch for the week leading up to it and even through most of the day. But by the time I go to run it in the evening, it shows my next workout as the current one. The workout remains scheduled on my phone app, and I can tell it to load it on my watch, then force a sync, but it will never show up. Usually the workout remains in my generic workout folder, but when I do the workout, it doesn't register as having completed it in the training plan itself.
In the grand scheme of things, it doesn't really matter, as I can find and do the workout. It just annoys me from a completist perspective that these are disappearing from my watch and refusing to come back.