Recipes which use tags do not have the same right-click menu pop up for choosing which items you want to use in the recipe.

If you have two stacks of different types of wood, you cannot choose which will be used when crafting a stick.

This seems to me like an oversight, given we already have the grouping functionality. I'm not really sure if I can classify this as a bug, but it can be argued that it is one.

If tags are made to behave like grouping, that could significantly cut down the number of files needed in a datapack. Even the vanilla datapack could benefit from this.