I tried to automate an automatic precision dropper for crystals but as soon as I placed a redstone dust in in it started dropping about 3 stacks of redstone without consuming the one I had put first. This only happens with redstone and I can only stop it with a redstone signal. I suspected the Refined Storage crafter was putting more than 1 redstone but it still happened after I disconnected it.

Do you have FluxNetworks installed? If yes, this is duplicated of #747 (which seems to have some duplications)

-- I'm not sure

Cannot reproduce (1.12-r115). This is not on our end. Duplicate of #747

Yes I have flux networks.
Had to use a vanilla dropper instead but thanks for the explanation.