Unnecessary rerenders after update to 8.1.0 from 7.4.2

[aizerin]

Are you submitting a bug report or a feature request?

Bug Report

What is the current behavior?

In 8.1.0 each field is rerendered with user input to any field.

What is the expected behavior?

Works as expected in 7.4.2.

Sandbox Link

https://redux-form.com/8.1.0/examples/simple/
https://redux-form.com/7.4.2/examples/simple/

[mikew]

I wonder if this has anything to do with using the new context stuff. Even the React team has something to say about them:

My personal summary is that new context is ready to be used for low frequency unlikely updates (like locale/theme).
facebook/react#14110 (comment)

[petrjaros]

This is probably caused by react-redux@6.0.0: reduxjs/react-redux#1164

[markerikson]

Note that in version 6.0, the wrapper components generated by connect() do their update work in render(). That means that they will re-render, even if your own component does not.

I've seen a couple other people report that the on-screen indicators seem to be flashing all the time. But, use of the React DevTools Profiler indicated that it was really only the specific connected components that were updating.