got kicked when move water from Water jug to water bottle

(01:18:02) | Failed to call hook 'CanMoveItem' on plugin 'ChestStacks v1.3.3' (AssertionException: Assertion failure. Value was False

Expected: True

split_Amount <= 0)

at UnityEngine.Assertions.Assert.Fail (System.String message, System.String userMessage) [0x00043] in <0b31faaf1c50461d95c83ac166a20393>:0

at UnityEngine.Assertions.Assert.IsTrue (System.Boolean condition, System.String message) [0x0000f] in <0b31faaf1c50461d95c83ac166a20393>:0

at Item.SplitItem (System.Int32 split_Amount) [0x00000] in <f596c704d3344dff96d37707463cf52a>:0

at Oxide.Plugins.ChestStacks.CanMoveItem (Item movedItem, PlayerInventory playerInventory, System.UInt32 targetContainerID, System.Int32 targetSlot, System.Int32 amount) [0x0012d] in <05e5ead82aa2445f89ad3a8edc6a8f60>:0

at Oxide.Plugins.ChestStacks.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000cd] in <05e5ead82aa2445f89ad3a8edc6a8f60>:0

at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <3606d2af539c45e4b5c61658e6a8b307>:0

at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <c2afd8354b8b4f3ca451cf5a1aa111c3>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <c2afd8354b8b4f3ca451cf5a1aa111c3>:0

(01:18:02) | AssertionException: Assertion failure. Value was False

Expected: True

split_Amount <= 0

I can instantly reproduce the error. With default settings on StackSizeController and ChestStacks with a water jug. I'm attempting to find the exact issue. But this returned -100 for some reason which is why the exception happens.
Puts($"Stackable: {movedItem.info.stackable}");
var itemToMove = movedItem.SplitItem(movedItem.info.stackable);

Merged post

Oh yeah, all you need to do is run the same check PlayerInventory.MoveItem uses. num3

Unload StackSizeController (and all others plugins) and tell me if the problem is solved.