this mod overwrites stacksize modifiers from wormmus config and other stack-size altering mods due to changes being within data-final-fixes. resolve by placing stacksize modification within a config-dependent part of code.
if settings.startup["modifyStackSize"].value = true then {do stuff},
and preferably, this should actually go into data.lua--though not sure if that would necessarily fix the mod-interaction. Wormmus and Noxy's stacksize mods may need to set your mod as an optional dependency to force theirs to load after yours.