BibTeX does not have the right entry for preprints. This is a hack for producing the correct reference:
@booklet{EasyChair:4433,
author = {Michael Rawson and Giles Reger},
title = {Automated Theorem Proving, Fast and Slow},
howpublished = {EasyChair Preprint 4433},
year = {EasyChair, 2021}}