Event Inventory Space Requirements

I cannot think of other item than white/red/golden cherry blossom branch that occupy more than a 1x1 event inventory space (1x2), why is it a requirement for event inventory to have 4x4 if there's no such item that needs that big of space.

Also Cherry Blossom Play-Box drops the item to the ground, meaning that if there's no 1x2 space to pick the cherry branch, you just don't get it but no error will happens if requirement for using an event inventory item is reduced from 4x4 to 1x1.

It is well-known that the majority of users experience issues when trying to use event inventory items due to space requirements.

It is on any server owner resposibility if he decides to add an item that is claimed into the event inventory directly that requires more than a 1x1 space, because default configuration (and webzen) has non.

This is how it works in webzen, it only check for normal inventory requirement, event inventory can be full.