Snapshot 13w04a, Snapshot 13w05a, Snapshot 13w05b, Snapshot 13w06a, Snapshot 13w07a, Snapshot 13w09a, Snapshot 13w09b, Snapshot 13w09c, Snapshot 13w10a, Snapshot 13w10b, Minecraft 1.5, Snapshot 13w11a, Minecraft 1.5.1, Minecraft 1.5.2, Snapshot 13w17a, Snapshot 13w18a, Snapshot 13w18b, Snapshot 13w24a, Snapshot 13w24b, Snapshot 13w25a, Snapshot 13w25b, Snapshot 13w25c, Minecraft 1.6.1, Minecraft 1.6.2, Minecraft 1.6.4, Minecraft 13w39a, Minecraft 13w39b, Minecraft 1.7.1, Minecraft 1.7.2, Minecraft 13w48a, Minecraft 13w48b, Minecraft 13w49a, Minecraft 1.7.3, Minecraft 1.7.4, Minecraft 14w05b, Minecraft 14w06b, Minecraft 14w07a, Minecraft 14w08a, Minecraft 1.7.5, Minecraft 1.8
Windows 7, Java 7
Happens in survival too.
A hopper is filled with one item, but still have space for only this item (look at the image). A water current is above carring 2 items, red wool and blue wool.
The blue wool should go to the hopper, but sometimes its so close from the red wool that the hopper ignores it.
-Make a clock and a path like the one at the image
-Fill one dropper with red wool and the other with blue wool
-Let the clock run for a while and you will see some blue wool going by the hopper even if the hopper isn't full
I've searched but found none like this at the issues list
You don't need the water, you can do just like the last image. The hopper is still filled with blue wool, but still have space for it.