I'm pretty convinced this is because the app switcher can recognize _whether_ a part of an app's UI is a native text field and not just an image, but it's not smart enough to pull the text out. I've seen it make number 0 -> letter O and other such mistakes before, so I'm convinced it's using OCR. Which is probably harder for Chinese.
It's crazy to me that it can't just use the accessibility APIs.
It's crazy to me that it can't just use the accessibility APIs.