I have encountered a problem with the firewall pipe. If I block everything except for power flow the system will still try to route through the firewall pipe but as soon as it hits a logistic pipe (basic or any other) the firewall pipe block goes through and the item will pop out into the world.

I have made a very simple setup to reproduce the bug which can be seen here:

The firewall pipe is set to blocked on everything except power flow. Then placing a few stacks of cobblestone in the chest with the quick sort module (the one to the left in the image) will show the problem. Some particles will show in both chassis pipes and after a while the cobble will pop out into the world.

The newest build should fix this.

Yup seems like it works well :) thanks for the fix!