Some machine put automatically items in output (mining laser, cargo landing pad, the excavator (cf #314)), this work perfectly with chest but with conveyor ejector, the items go first in the black/white list inventory, and when we click it they disapear
This is an exemple of setup :

and the results :

(here there is another problem : the battery is extracted from the miner by the extractor, but this is not the main problem)

Just put a crate in between them like everyone else.