Solved
Function this.world.WorldInventory.grantItemToPlayer doesn't work as expected
I have been working on the new Economy world tutorial from Horizon World Documentation and find that line 82 WorldInventory.grantItemToPlayer(player, this.props.lootSKU, this.props.lootCount); ...
Might be a bug, but there is also a delay before purchases are reflected this way. Might need to wait a couple seconds before checking their entitlements.
Also is your quantity value greater than 0?
