Per the changelog: It is no longer possible to dye bundled items.
That entire bundles were able to be dyed with a single vial of dye was an oversight when the bundle mechanic was introduced. Dyes have always been meant to be used on individual end products.
No longer possible to dye bundled items
No longer possible to dye bundled items
<Rias> PUT ON PANTS
<Fellborn> NO
<Fellborn> NO