Healing buff icon is shown on the healer not the target.
The way healing works you can be healed by many people but you can only heal one person at a time.
You can also switch targets mid heal and since healing only takes place at the end of the action, it could be very misleading for a player to think they are being healed, then suddenly have nothing happen because their healer switched targets.
Consecrate is applied to the weapon itself. If you unequip or switch weapons, the effect goes away. The buff Icon accurately reflects whether or not you have consecrate in effect.