HarmonyOS system has just been upgraded. Why are some fonts black and some white?

This should be a BUG, and the subject can post feedback in the internal test feedback of the Pollen Club. I think the high probability is a matter of theme adaptation. The original harmonyOS theme I used doesn't have this problem, or you can try to change the original theme and then change it to your current theme.

System:

The word system comes from the transliteration of English system, that is, several parts are interrelated and interact to form a whole with certain functions. Qian Xuesen, a famous scholar in China, believes that a system is an organic whole with specific functions, which consists of several interacting and interdependent components, and this organic whole is a part of a larger system to which it belongs. In the theory of digital signal processing, people call the entity that can process and convert digital signals a system.