When an item is dropped naturally or thrown into a hopper, the item normally shows up in the hopper's inventory. When the item is teleported to the area of the hopper using the tp command, the item will still be "sucked in" by the hopper as normal, but the item never shows up in the hopper's inventory. This is breaking some redstone components, as it was working as recently as 14w31b.
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.