Why status bar changes when text input / keyboard is active?

I have a project built in react native(v0.59), and the problem is happening on iOS 13(didn't test on lower version).

When the text input / keyboard is active, no matter if it's native input or input in webviews, the status bar will change from black to white.

I have set the status bar style to Dart Content and toggled View controller-based status bar appearance between YES and NO. But the problem is still happening.

Any suggestions are appreciated.