My mules can't hold four kegs of potions (poison, cure, heal and str) so I normally keep a keg of Posion and Cure on me and if I need to use Heal or Strength then I just click the button on the Plant Gump and then target the keg I need inside a secure. This has worked for months but now it's not. When I click on STR or Heal and don't have the keg in my box, the gump flashes but nothing happens. No targeting cursor and no way to get the potion onto the plant. If I put Poison and Cure into the secure then it seems to work. Clicking the Poison or Cure button still gives a targeting cursor if I'm not holding the kegs. This is very strange to me.