Unstacking stacked items causes items to disappear
If I have 5 satchel charges stacked, and unstack, I lose satchel charges. I'm unsure if it happens with other items.
  1. Stack 5 satchel charges with custom skin
  2. Put satchel charge stack in your inventory
  3. Highlight satchel charges
  4. In splitting dialog box above, click and drag item picture into inventory
  5. You will now have 3 satchel charges. 1 individual satchel charge and a stack of 2 satchel charges.
  6. Continuing this action will lose more
If I disable this plugin I no longer have the issue.
1. Please provide video
2. Please provide list of installed plugins
3. Does it works on empty server (no plugins, only this one)
5ba216a6d7f65.png Orange
1. Please provide video
2. Please provide list of installed plugins
3. Does it works on empty server (no plugins, only this one)
1. Video below

2. I'll provide you with list in Discord if you can't duplicate
3. I couldn't test that. It only happens when the item has custom skins.

Merged post

It appeared to be a skin-related setting in my stacks plugin. Thanks @Orange for your help in narrowing it down.

did you find how to fix it cause i have same problem 
i know its skin related cause i think it only happens on  sentry and recycler

mrdecoder

did you find how to fix it cause i have same problem 
i know its skin related cause i think it only happens on  sentry and recycler

I believe in my case I had certain skins white/blacklisted. Once I removed them the issue stopped.

I had a player tell me: "I just used mats to make 4 pythons they stacked and when unstacked I have 3" and "6 unskinned revolvers just turned into 4 unskinned revolvers"

I don't think it's related to this plugin though. It seems to happen only on unstacking after crafting.

Its happening with or without crafting, its also happening with or without both available Stack Size Controllers. This is the only plugin that handles CustomStackSkins and was working perfectly. Now there are issues with it and without it. This is suppose to address those issues. I am sure Orange can figure out the cause and get a new fix in place, he is pretty good at doing that kind of stuff.
5d35f1495da0a.jpg FastBurst
Its happening with or without crafting, its also happening with or without both available Stack Size Controllers. This is the only plugin that handles CustomStackSkins and was working perfectly. Now there are issues with it and without it. This is suppose to address those issues. I am sure Orange can figure out the cause and get a new fix in place, he is pretty good at doing that kind of stuff.

Then your issue is different than mine. I don't use this plugin and my issue happens only on crafting. (At least as reported - trying to find time to duplicate)