In my hot, dry climate that is a sign that the roses are not getting enough deep water to hydrate the foliage.
Deep watering provides long-term moisture to a plant. The anchor roots pump up moisture to the top growth. The soil moisture down deep doesn't evaporate as quickly as the surface soil moisture.
Your daily watering may not be enough to water the whole root mass, so it is inefficient in getting moisture up to the top growth.
Most rose literature defines deep watering to have moist soil down to about 18". Of course plants don't measure how deep you have watered, but you can see water stress by burnt foliage.