One of my clematis Tekla stopped growing a month ago and sort of froze in time. Its leaves started having grey spots and new growth leaves dried out as you can see from the picture below. Initially I thought that it is a clematis wilt, but reading through variety of resources does not confirm this fact since leaves don't turn black and fall and they don't fade but rather being covered with grey spots. In addition it has been like this for a month while I read that clematis wilt damages the branches within days so must be a different fungus? Can anyone help identifying what it might be?