Hi @p455w0rd, I am using your mod in my modpack that i am playing with and I noticed after you said that this problem was fixed in the AE2 Github #2270 But ive been playing and this problem keeps happening.

I am plating in a single player world.
I am playing in a custom modpack that I made for just me.
fml-client-latest.log

Applied Energistics Mods:
AE2: aapliedenergistics2-rv3-beta-6.jar
WCT: WirelessCraftingTerminal-1.7.10-rv3-1.8.6.2b.jar
AE2 Stuff: ae2stuff-rv3-.5.1.9-mc1.7.10.jar

need info...what ae2 version, what WCT, offline/SMP, etc..any relevant info you can provide as everything works for me..what pack? if a custom pack, then mod list..perhaps even upload a copy of fml-client-latest.log to pastebin and post the link...thanks for the report!

I have tested extensively and cannot reproduce this, therefore I am unable to create a fix for it. Try creating a new instance and only include ae2, wct, and ae2stuff, then create a new world and tell me if the problem persists. for now I will close this issue in hopes that someone might create a new issue if they have the same problem.