Summary of the problem Items momentarily disappearing when shift-right clicking to place them. Pack Version 1.1.3 What is the bug? Items disappear momentarily when trying to place them in-world with shift-right click. This only happens on tile entities. Eg, placing a hopper on the tinker's furnace controller or a hopper on a chest or a item relay on a chest. The item disappears on placement and then either re-appears in my inventory if I click and sort a bit. Or it appears in-world but with the wrong rotation, eg not connecting to whatever I was connecting it to, but rotated so it's connecting to a wall etc. Mod & Version Different mods, even vanilla items. (hoppers and chests) Happens to me in 1.1.3 and 1.1.4 of the pack. Link to log file http://paste.feed-the-beast.com/view/ed22e57a Is it repeatable? Yes Known Fix Removing the tile entity I try to place something on and replace it with dirt or cobble or similar. Then placing the hopper or relay against the cobble/dirt. Removing the cobble/dirt and placing the appropriate tile-entity back so it's connected to that instead. You get creative building your logic in reverse order to get things all connected.