I'm not sure how this happened, but after installing your latest update with https://mods.factorio.com/mods/MrDoomah/all-tiles-stack-to-1k installed as well the stacking to 1k does not work anymore.
Seeing as only your mod updated lately I'm not sure how a supposedly only-graphical-replacement-mod could mess this up, but somehow it does. Can you take a look whether something could be interfering?