I was trying to autocraft every plate using refined storage and create. Iridium plates and diamond plates can't be pressed using Create's mechanical press, but they can be crafted using hammers. I set up the crafting autocraft for both of the plates using hammers, and instantly my FPS dropped to less than 5 while using my RS system or having the patterns in my inventory. The lag also persisted when the patterns were put inside of a crafter. Burning the patterns cleared the issue.

Edit: I am currently on the latest version, 0.4.32
Edit 2: This may also apply to any plates made involving the hammer being put into a pattern

Sounds like the same issue as #1522

I'm not sure if I remember the exact recipe I was doing, but I also had this issue with RS patterns. Certain patterns were dropping my FPS from like 100 to like 1-5 FPS. Spent like an hour trying to figure it out until I realized it was a pattern.

For reference I am also on 0.4.32

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