I noticed my CPU spiked up to 98% while just knocking out a bunch of Mastercraft Precrafts. I use a macro for them, but it seems the solver at some point glitched out and starting spamming exceptions, after a game restart it started back up with the same exception spam while crafting.

That list goes on for a while, here is one of the detailed exception entries

Not sure if related but this is thrown immediately upon opening the crafting window after re-enabling the plugin

Additionally if it helps I was crafting Purussaurus Leather at the time.
For reference in level of CPU it triggered - AMD Ryzen 9 5900X 12 core; my PC generally has about 10% of the CPU taken up by the game with mods running.