I not sure if it happen all the time but i would say about 50% reproduction rate. Happend to me last night in new multiplayer game without any mods. (4 players, 4x win 7 x64)
Unfortunatly i wasnt MC and have turned off autosave + we got wiped at the end so i dont have save.
Example of setup
T - transport bell, I - inserter. B - boiler
Code: Select all
T - I - B -I - B - I - B - I- B
T - I - B -I - B - I - B - I - B
T - I - B -I - B - I - B - I - B
T - I - B -I - B - I - B - I - B
T - I - B -I - B - I - B - I - B