I don't think so, although it's a good theory. The dough was pretty stiff and dry, and the a/c was on. Maybe I wasn't diligent enough about flouring the dough, but it went through the flattener just fine. The cutter seems to be both snagging the dough and not cutting all the way through it.
The only differences between last night and every other time I've made pasta is that I used sourdough discard, and I didn't let the dough rest much after kneading.