32-bit apps and 32-bit archives are entirely different topics.
zip archives are transportable across a wide variety of platforms, and zip and unzip was 32-bit until zip 3 / unzip 6. (I’m still playing Whac-A-Mole with some folks running older versions, too.)
If the “real” unzip tool is hitting this crash, then there’s a bug or incompatibility in whatever tool compressed the file, or there’s a bug or limit in unzip, or a hole in the zip archive design. And it’ll still be necessary to read the older 32-bit zip archives for the foreseeable future, too.
Do you have an example zip archive file you can post somewhere? Folks here can take a look, and maybe this then gets identified and maybe then involves the Info-Zip folks? Also details on what OS and tool and command was used to generate it?
Based solely on what’s been posted, I’m wondering if there’s a filename-encoding incompatibility somewhere. Which would be entirely unrelated to 32-bit apps.