Possibly related research: alt-view item display - researched
Setup:
Factory 2 (currently displaying lab on upper left and upper right), yellow inserter towards factory sitting at an input/output spot, logis chest with items (red bottle)
When powered, inserter starts to grab a red bottle and inserts into factory. Factory starts to display one more item this time, red bottle on lower left, and this lasts for 1~5 ticks. The inserted item cannot be found.