[Gameplay] Buying elixers while dead with full item slots starts the elixer timer immediately

Steps to replicate:

1. Buy six items so the item slots are full.
2. Die.
3. While dead, purchase a consumable item: (Not sure if does the same.)
4. Timer immediately begins counting down.

Expected behavior: 4. Timer waits until champion respawns before counting down.

This is an issue because the item cannot be used unless the champion is alive, so this behavior effectively reduces the time the potion is useful by the time left on the death timer.