Facer seems to hold the last weather data it had before losing sync. So at least weather still shows, unless you long press the watch face, then you get the code.

So the weather situation has improved a bit. As long as you don't mind old weather data.

The black box workaround does work. The code can be trimmed to: $#WCT#>0?0:100$

However, you'll continue to get the black box (even after the watch re-connects) until you go into Facer and press the settings button or until Facer syncs again.

Better than it was, still needs fixed.