Itemduct problem, missing items

[Dreossk]

Hello, I have a series of TE machines that all output to a gold chest via impulse itemducts. I also have a sheep shearing farm that plugs into the same duct. The problem is that the product of the machines (which are two blocks away from the chest) sometimes disappear in another dimension and never reaches the chest. To fix it I have to break the chest and replace it and bam all the items appear. Any help?

 

[wolfsilver00]

Maybe you're reaching the limit an itemduct can transport? Try to use separate lines

 

[Dreossk]

Why doesn't it transport them when nothing else is moving through?

 

[wolfsilver00]

Then thats how you bug Thermal Exapnsion