This is related to the ongoing store issues and we are still working on fixing this system. We are aware that some players may still be having trouble collecting certain items and packs from their Product Inventories – this is flagged as a bug and we are still working to fix it, but we will ensure those items “unstick” in the future. Unfortunately I do not have an ETA, as this has been something that we are improving over time, but is still a priority.