Weird Issue with TE and Using Hoppers

[Draco18s]

I have no idea what's wrong here, but essentially my problem boils down to this:

 

When using the GUI for my block, all the slots update correctly, including the output slot.

When using a hopper to input (or extract) items, the output slot does not update at all (although it is saved, exiting and reloading shows the correct stack size).

 

I'm not even sure where to look for trying to solve this as it only occurs when specifically using the hopper (not using any mod added item transport).  And yes, I am using markDirty().

[Draco18s]

Anyone?

[yariplus]

I remember I had a similar problem before. I put this in my Inventory te's setInventorySlotContents:

 

if (worldObj != null) worldObj.markBlockForUpdate(xCoord, yCoord, zCoord);

 

That block rendered the items though, not using a GUI, so I don't know if it applies.

[Draco18s]

Ha, that worked, awesome.

[yariplus]

Glad I could help!