error description: a blueprint of this blueprint looses the disabled options and reverts to default options.
see this picture:

I: original belts with circuitcable connection. a blueptint is made from this original.
II: the blueprint is placed but not built. a second blueprint from those ghosts is made.
III: the second blueprint is placed. when it is built, the default settings of the ciruit-connected belt are applied. which means the "enable/disable" option is ticked. this behavoiur blocks the belt.
this error was first discovered in 0.16.48 and persists until 0.16.51.
other entities may be affected too.
savegame