KeyboardAvoidingView Android white area when keyboard open/close

Description

When using KeyboardAvoidingView on android, whatever the configuration I use for the behavior or the keyboardVerticalOffset I always have a white area when the keyboard is opening or closing while on iOS everything is moving smoothly.

https://user-images.githubusercontent.com/21194324/142198993-243f9d37-07ae-4b10-bc7d-2357867629fb.mp4

In the video, we can see that when the keyboard opens there is a big white area and when closing sometimes a small white rectangle with some flickering. I'm wondering if this is normal behavior because on iOS it transitions smoothly

I tried modifying android manifest with android:windowSoftInputMode="adjustResize" or android:windowSoftInputMode="adjustPan" but the problem is still there with both config.

It would actually be ok if we could change this color from white to something else like the background color of the content (red in my example). But I couldn't find a way.

Version

0.66

Output of react-native info

It happens from the documentation snack so I guess this section is not necessary

Steps to reproduce

Take the example from the KeyboardAvoidingView of react-native documentation and modify the background color of the container from white to red in order to see the white area when opening/closing the keyboard.

Snack, code example, screenshot, or link to a repository

https://snack.expo.dev/@flowwwww/keyboardavoidingview

首先，在 Android 上使用链接的 Snack 重现文档中的 KeyboardAvoidingView 示例，并测试所报告的行为和 keyboardVerticalOffset 设置。比较 adjustResize 和 adjustPan，同时观察白色区域和闪烁现象；当所报告的过渡行为得到解决，或明确确定了受支持的区域颜色控制方式时，即可视为完成。