Solvedgrimoire 3.8+ can pickup "rejected" items?

so, this isn't really a bug it's just not what i was expecting:

if you use grimoire 3.8+ then do the following:

join a private map where monsters drop a stackable item (cubes in boxes or bone dust in battleunderb)

click bot, then item then check reject non-whitelisted items (don't add anything to item whitelist. do not add the stackable item either)

now use the kill * command to kill a few monsters. no items will pop up (although strictly speaking the no button wasn't clicked either i guess)

using the same item menu as before, remove the kill * command and add the command: get drop bone dust or get drop cubes or whatever the stackable item was (that was supposedly being rejected as it was not on the whitelist)

run the bot again and you'll see that the number of bone dust/cubes you have increases despite it looking like it never popped up at all?

why exactly does it work like this instead of actually rejecting the items by saying no?

When you tick the Reject non-whitelisted option it only hides the pop-up of unwanted items. Once you disable the bot and you kill the monster it happens to drop the unwanted items, the original amount of pop-ups come up that's why you still get to keep that many.