To avoid lots of unnecessary tool changes tiled projects need to have the same machining order as the original saved project. In v11 this works with ‘machine individually’ unchecked. In v12.060 the original machining order is increased incrementally for each additional tile. No matter what option(s) are (de)selected the tiles have different machining orders… I’ll be really embarased if this issue doesn’t exist in 063 (current).
Video example is v11 6 tools = 6 tool changes VS v12 6 tools = 26 tool changes. There is no need to watch it all (the end steps through the 26 v12 tool changes).