Occasionally, upward facing Droppers will have Trigger Status stuck at true (even when emptied) rather than reset after first signal pulse. Not sure how often this happens, but it's happened a couple times to me already. This causes items to not get dispensed even when signal pulse is applied.
Linked issues
Attachments
Comments 4
The comparator detects that there's no items after I took the charcoal out. It took me about 5-6 builds of this build to replicate the issue so it's not super frequent, but I figured I should report it anyway. The dropper is supposed to "drop" the item once the comparator detects something is in it, but when this happens, it won't "drop" even if I right click the comparator to force a pulse from the observer. The fix for this (that I found anyway), is to break the hopper above the bugged dropper and replace the hopper and redstone (same orientation); don't know why it is, but I broke and replaced each piece and replacing that hopper seems to be the thing that fixes it.
Duplicate of MC-70127.
This is caused by MC-108
Please provide a screenshot of the exact setup with your F3 debug screen enabled.