Font color of the upper menu bar
I am having a problem with the font color of the bar at the top of the screen, which shows the current application and options. Normally the font color should be black, but sometimes, when I go into the full-screen mode, it becomes white and thus make it difficult to read.
Normal
In full-screen
In addition, from the second example (Chrome), if I minimize Google Chrome not to be full-screen, the font would change back to black.
Could anyone suggest me how to change the color setting or to fix this please?
Other information: running on MacOS Big Sur, using the dark theme. I am not sure if it have just started when I update the OS or if it started since Catalina. I have read some threads that suggest changing the color modes (light/dark) in the setting>general but that did not seem to help.
MacBook Pro 13″, macOS 10.15