In addition to generating a glass model markedly different from its ab initio counterpart, we identified several challenges when using the ReaxFF force field for ZIFs. We highlight them here, as they should be kept in mind and may be applicable to other molecular simulations of MOF glasses. to the sensitive response of these frameworks to small external stimuli, in particular for ab initio calculations. While every published work on ZIFs with ReaxFF used (N, P, T ) ensembles, no systematic validation has been published to this day.