more specifically, when you open the multiblock preview page of the large material press, it causes a massive lag spike. and its even worse if you open it from the ae2 terminal menu
#found a bug with the large material press
wide prism
it doesn't happen with any other multiblock preview
If you mean the lag and freezing its just a gtceu modern issue, happened to me on another modpack on another multiblock preview as well
marble lodge
ah