Growing Things: Protect winter garlic after fall planting

Q: I have a question regarding garlic. We’ve planted winter garlic every October or November in a raised bed. The first year we planted we had excellent garlic, and every year after it has either gone rotten or died. We’ve moved it around so it is not planted in the same place each year, and ensured that we plant when the soil is dry. We live at the base of the Rocky Mountains, outside of Hinton, and chinooks are a regular occurrence through the winter. Would this have a bearing