The first three images are of leaf and stem issues that are not canna virus. The first issue gave me some concern for a few years until I could establish this was not a virus. New leaves twist and do not unfold. Affecting groups of the same variety growing in the same conditions this can affect the plant for a few weeks and actually soon grows out. Despite looking serious I do not believe this is a virus as it doesn't affect the same plants over and over. At the nursery I usually see it at least once a year and there is no pattern to what plants are affected and it never affects large numbers of plants but there is an association with high day time / cool night time temperature extremes.
Sunburn damage often alarms new growers who are worried about canna virus. It occurs frequently. Shown on images two and three.