When look into statistics for a Question which has been redirected, it won't show the correct value.
Here is an example, in case you look into:
https://docs.microsoft.com/en-us/answers/topics/windows-10-general.html?filter=unanswered
It shows all unanswered questions in Windows-10-General and you will see a question Language bar missing and you will notice everything (Vote/Answers/Comments) are set to zero meaning there is no answer or comment.
However, if you click on the question it has Answer and Comment:
https://docs.microsoft.com/en-us/answers/questions/181321/language-bar-missing.html?redirectedFrom=181229
This happens for all redirected message and this is a bug.
The expected result would be updating statistics for redirected messages too.