In 5.2.9, Krita had a bug that prevented the double click to close shape for stylus and that helped put down vertices faster and close to each other. This can get annoying when you are trying to make shapes that do have corners close to each other, which can trigger the shape to close when you are working faster. The way I always close shapes is by completing the shape, clicking at the first vertex/point
So a way to disable the double click would help for those who use the polygon tool as a way to select a shape and fill it at once