Using React.Children.map in getChildMapping is causing element keys to change.

[maitrungdong]

What is the current behavior?

When I compare keys in child elements then get an issue that these keys has an additional prefix .$.
I think that is an unpredictable behavior and can make some bugs!!!

What is the expected behavior?

I want to these keys should be persisted.

Could you provide a CodeSandbox demo reproducing the bug?

I found this issue in the code base. The reason is using Children.map in getChildMapping method.
A similar issue on stackoverflow: link