Seems to not be working. Updated from 3.1.4 to 3.2 and now nothing will stack. using stacksizecontroller.setstackcat resources # give "operation completed successfully" back but after reload will not allow to stack.

Any errors in console? Post your config please.

{
  "RevertStackSizesToVanillaOnUnload": true,
  "AllowStackingItemsWithDurability": true,
  "HidePrefixWithPluginNameInMessages": false,
  "DisableDupeFixAndLeaveWeaponMagsAlone": false,
  "GlobalStackMultiplier": 1.0,
  "CategoryStackMultipliers": {
    "Weapon": 1.0,
    "Construction": 1.0,
    "Items": 1.0,
    "Resources": 250000.0,
    "Attire": 1.0,
    "Tool": 1.0,
    "Medical": 1.0,
    "Food": 1.0,
    "Ammunition": 1.0,
    "Traps": 1.0,
    "Misc": 1.0,
    "All": 1.0,
    "Common": 1.0,
    "Component": 1.0,
    "Search": 1.0,
    "Favourite": 1.0,
    "Electrical": 1.0,
    "Fun": 1.0
  },
  "IndividualItemStackMultipliers": {},
  "CategoryStackHardLimits": {
    "Weapon": 0,
    "Construction": 0,
    "Items": 0,
    "Resources": 0,
    "Attire": 0,
    "Tool": 0,
    "Medical": 0,
    "Food": 0,
    "Ammunition": 0,
    "Traps": 0,
    "Misc": 0,
    "All": 0,
    "Common": 0,
    "Component": 0,
    "Search": 0,
    "Favourite": 0,
    "Electrical": 0,
    "Fun": 0
  },
  "IndividualItemStackHardLimits": {},
  "VersionNumber": {
    "Major": 3,
    "Minor": 2,
    "Patch": 0
  }
}

Not sure what to tell you. It's working fine for me, set the insane multiplier incase that caused an issue, and no problem. Stacked wood to 10 million so clearly it's working.

I used your example config file. Updated to 3.2.1 still not stacking.  Any ideas?

Merged post

deleted everything works fine now.