What is causing this rerender?

[Undistraction]

I'm trying to understand why opening a modal causes a full page rerender. Using the profiler I'm seeing the following:

I know AppContainer is part of Gatsby's internals, and I'm assuming _default is too, but why is _default rerendering? The reason given is that its parent props have changed, however, AppContainer isn't rerendering. What props could have changed in AppContainer that it would pass into _default?

[herecydev]

PageRenderer is really the last part of "Gatsby internals", are you sure AppContainer isn't something you're bringing in? Perhaps as part of wrapPageElement?