How to reproduce: - start new game, creative or R&D - spawn or swap the snapshot tech: - observe non-functional conveyors as highlit below - Try re-attaching an affected conveyor (any of the 'non-directional' ones) - conveoyr direction switching becomes erratic. - Try reversing any of the non-directional conveyors without reattaching it first. The game will hang almost immediately. Endless loop in another thread probably. - Reattach the adjacent Filter: this appears to temporarily fix the issue. Happy hunting!