Factorio Forums

If inserter has lane control drop for the entrance underground belt. The inserter can only drop to the outer lane. The top setup show how the iron plate is dropped.
The expected behavior for the inserter drop is on the right setup. The left inserter dropping near and the right inserter of the setup drop far.

Please advise if this is the expected behavior or can it be fixed.

Given you did not provide a log file (that would contain details about mods used) or a save file (that would allow to quickly verify the behavior), since i am seeing the inserter drop arrows at a different positions i am going to say that this is a mod issue. Decision on which lane an inserter will drop depends on the belt piece and exact drop position so if the mod switches between 2 drop positions for which an underground belt selects the same belt lane i am going to say this is a Not a (base game) bug.

vanilla behaviour: