Bellas discussion (one of the third group)

This group of photos is a collection of leaf spots.

The first photo shows the leaves of Xiaozhu, which began to be cultivated at the end of 1998, and the whole pot is still alive. That is, the growth is relatively slow, its leaf spots are successive generations, and the petals have similar markings when they bloom.

Please point out whether this is a disease or not and what kind of disease it is. (Zheng Yuhui)