So I’ve been using Facer for a while, and I’ve noticed that a lot of faces that have the second hand/display on AOD just freezes instead of ticking the seconds along. Any way to fix that?
There is no way to fix it. It‘s built in the ios of the smartwatches. They do not display seconds to avoid battery draining.
I think the real “issue” is the refresh rate when your watch is in AOD mode. I believe the seconds still tick, it’s just you won’t see it for like a minute or more. Most people prefer to just deactivate their “seconds” layers/elements just so they don’t look like they are frozen 
but that’s up to the author of the watch face.
Most smartwatches update the display once a minute when in AOD mode.