This bug was fixed in v186: Override.

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Bug type: Functionality

Brief bug summary: If your pet auto-heals you in a map with a potion cooldown, using a potion manually will restart your potion cooldown, even if there is already a cooldown in progress. Additionally, a pet auto-healing you will not activate the cooldown overlay or tell you how many seconds are left in the cooldown.

Steps to reproduce:
1. Enter a map with a potion cooldown. Examples: Gollux: Head, Empress, Lotus, Damien, any normal Tower of Oz floor, and more. Just find a map with a potion cooldown.
2. Make sure you have your pet set to auto-heal you with a potion.
3. Get hit by an attack that makes your pet heal you.
4. After your pet has healed you with a potion, look at your potions. There is no cooldown overlay or cooldown seconds timer over your potions.
5. Wait a second, and use a potion. The potion will not work, and it'll restart your potion cooldown, even though the potion cooldown should have been counting down from the potion your pet just used.

For example, in a map with a 15 second potion cooldown, after 10 seconds of your pet auto healing you, you use a potion manually. Now nothing happens and your potion cooldown has reset back up to 15 seconds, even though there were supposed to be 5 seconds left in the cooldown! You're now up the creek with an extra 10 seconds of potion cooldown for no reason.