Check whether custom dropped items should merge into one stack

Items with similar names can carry different metadata and should not automatically be treated as interchangeable. Test custom-item stacking with a small labelled comparison set.
Check the installed content
RoseStacker stores behaviour for stacked mobs, dropped items, spawners and blocks. A stack label is not a reliable inventory of every underlying entity or item. Test one feature at a time with expendable objects before changing rules that affect existing farms.
Work through the change
Record the custom item provider and the RoseStacker version. Back up the staging inventory and the item-stacking configuration before changing compatibility rules.
Prepare ordinary identical items, two copies of one custom item and a visibly similar item with different legitimate metadata. Keep the quantities small and record each starting count.
Drop each comparison set separately in a clear staging area. Observe whether it merges, then pick it up normally and inspect its identity and total quantity.
Repeat after one documented item-stacking adjustment only if the installed reference supports it. Check pickup into a nearly full inventory and compare the preserved custom behaviour after collection.
Verify the result
Compatible copies should retain their total quantity and custom identity, while genuinely different items should remain distinguishable. A merged display must not erase information needed by the custom-item plugin.
If the result differs
If custom items lose behaviour even without merging, inspect their own provider first. If only one metadata combination fails, retain that exact disposable pair for a compatibility report rather than weakening every comparison rule.
Keep a recovery path
Restore the previous stacking configuration and staging inventory checkpoint if identity or quantity changes. Keep valuable player items out of the test and do not use item-clear commands to tidy a live area.
References and related help
Check the maintainer reference: RoseStacker documentation, RoseStacker documentation.
Before changing live data, read how to keep a completed recovery copy. For startup errors, use the log collection guide.