Description
I am using the latest version of AE2 on 1.12.2 and when I shift-click or click on an item to remove a stack it doesn't remove an entire stack. The number of items I can remove seems to reduce the more I add to the system.

Enviroment
I am in single player. If it helps if turned channels off in the config

• Minecraft Version:
• AE2 Version: appliedenergistics2-rv5-stable-11.jar
• Forge Version: forge-14.23.2.2613

Is there enough power in the system?
Try adding a couple (dense) energy cells and see if the problem disappears.
This sounds like a power problem.

Thank you that has solved the issue