Add some missing portion in explanation of resetting state at same position

[Scramjet911]

Render component in different position is missing a crucial explanation for people new to react. This stackoverflow answer gives a much better explanation.
Since people might miss that it is due to the value of false in the tree that the positions are changed. Please add it to the docs if possible

[rickhanlonii]

Closing in favor of #6578. Even though it's newer, it has more information.