I had this happen to me accidently. Earned the bunny reward and didn't realise it was in button 1 instead of my mana pot. I stacked hunt elixirs to 18 hours and had 12 hours left when I accidently used the bunny. All but the magic find topped up. The magic dropped to whatever the bunny offeredThe reward overwrites "magic find" resetting to just the time on the consumable but adds exp time etc, as expected. Not a biggie just niggling.