When you use Vocation Expertise Tonic, Vocation Hastener Scroll, Classic Service Uniform (-5% Production time) and Dewy Dawnsdrop Breeches it pushes crafting speed not to have craft time at all. With that crafting bundles becomes instant which glitches crafting queue making you unable to craft using crafting queue. There's no craft time, not even the animation and the crafting queue stops after each craft. Video: https://puu.sh/DDf0w/c8842d30bc.mp4 Once all these buffs stack up the queue breaks for faster crafts. It starts to work again once the buffs fade and the craft time becomes long enough for the cast bar to show up.