Cancelling Item drop inside invetory splits/moves the ItemStack

Expected behavior

When Item drop is cancelled the item stack affected should not be changed in any way

Observed/Actual behavior

When item is dropped from inside inventory this is cancelled, the item is readded into selected slot instead of original itemstack/slot

Steps/models to reproduce

prepare plugin cancelling all PlayerDropItemEvents

1. get a stack of any item (/give @p minecraft:dirt 64) and have it in first slot
2. select any other slot
   3.a) open inventory and drop one of the items using q and hovering the item stack
   3.b) right-click the item and drop it outside of the inventory
   3.c) left-click the item and drop it outside of inventory

Plugin and Datapack List

only the test plugin cancelling the drop events

Paper version

This server is running Paper version 1.20.6-137-master@bd5867a (2024-06-04T21:04:28Z) (Implementing API version 1.20.6-R0.1-SNAPSHOT)
You are running the latest version

Other

No response

Reproduce the issue on Paper 1.20.6-137 using a plugin that cancels all PlayerDropItemEvents and the listed inventory interactions. Trace the inventory drop and event-cancellation handling; done means cancelling the drop leaves the original item stack and slot unchanged for all three reproduction cases.