Yeah, I get that sporadically with my animated faces. I figured it was either watch related or because I use the StayLit Wear app to change the default wake mode to 10 seconds.
I notice some times (maybe around 5-10% of the time) that an animation will freeze (or the brightness flicker) for a few seconds between the transition from wake to dim. It never really bothered me since tapping would wake it clearing the freeze or waiting a few more seconds it would go to Dim all the way.
Thanks for your comment @eradicator09. Well you are right, nobody cares about the smooth or even lightly broken transmission. I realized it maybe only because I used the “Pure #DWE# Animation” for the first time… so I watched and watched up to the DIM Mode