Thanks for the reports.
A fix for the offscreen animations is now in.
For static models, like the city, do not enable worker mode for now (it will likely have worse performance and other issues eventually I will fix the other issues, but they are lower priority, since worker animation mode should generally not be used for static models.)
For back face cull, the model must be using CCW ordering for vertices. If it does not, do not enable BFC.