Tradable magical pies are currently being used from the inventory before non-tradable ones.

Is it possible you had the non-tradable higher in your inventory than the tradeable ones?

I did not know that made a difference haha. I just thought the non-tradable ones were used first by default, but I guess that's just the way I normally have them organised. Thanks! (:

So, newer features (which really isn't much in regards to item consumption at this time) use a global function that cleanly reduces stacks/uses items. However, older features, such as the pet profile page, does it manually directly in the page.

The newer method builds an array of all valid items and then sorts them putting Not Tradeable ones first - making sure that they are always consumed first. However, in older features, it's just kind of random depending on however it was coded at the time I wrote the code lol. For using philters, I think it just literally grabs it from the database table and whichever row happens to be pulled first is the one that's used.

Unfortunately, the code specifically for philters is very convoluted. I don't really want to touch it in an attempt to change this at this time; it most likely will cause unforeseen consequences. Whenever pet profiles/using philters is overhauled, this will be updated though.

Ahhhh okay that makes sense. Thanks for taking the time to explain how the code works. I'm still pretty early on in my computer science degree but I love to hear how stuff works behind the scenes (: