Bug: <StrictMode> unexpected behavior for double invoked functions

Detailed explanation of the case and reproducible example is in the sandbox itself: https://codesandbox.io/s/smoosh-wind-9lrpp3?file=/src/App.js I can only guess that there is a reason behind this decision but I can't understand it, or maybe I'm right and this could be changed. At the moment this behavior looks more like a bug than intentional implementation.