I finished talking to the Primordial Guardian in "Secrets of Anankis" and I was to choose a reward. At that time, my inventory was full and I didn't know. However I was still able to accept the item, but alas the item was missing when i completed the quest. If my inventory was full at that time, I should not be able to accept the quest rewards. I'm not sure if you guys did implement a system to prevent players from accepting rewards when inventory is full, but I'm just gonna leave it here :D. Thank you and have a nice day. Hope to see the game in its full glory soon