ACL template broken by Type 2A characters

There is currently a formatting issue in which the existing ACL template breaks when using any Type 2A characters.

Authors have been instructed to follow the comment in the ACL 2023 template (% See https://www.latex-project.org/help/documentation/encguide.pdf for other character sets). Doing so points to the following:

\usepackage[T2A]{fontenc} %aaron https://www.overleaf.com/learn/latex/Russian
%Hyphenation rules
%--------------------------------------
\usepackage{hyphenat}
\hyphenation{ма-те-ма-ти-ка вос-ста-нав-ли-вать}
%--------------------------------------
\usepackage[english, russian]{babel}

Unfortunately, this appears to heavily affect the ACL template in such a way that it fails Pubcheck and visibly changes formatting.