[Bug] testing error "Cannot flush updates when React is already rendering."

[tesseralis]

I’m getting this weird warning on npm test:

Warning: unstable_flushDiscreteUpdates: Cannot flush updates when React is already rendering.
          in video (at Masthead.tsx:24)
          in a (created by LinkAnchor)
          in LinkAnchor (created by Context.Consumer)
          in Link (at Masthead.tsx:22)
          in VideoLink (at Masthead.tsx:93)
          in div (at Masthead.tsx:91)
          in Masthead (at HomePage.tsx:23)
          in main (at HomePage.tsx:22)
          in Main (at HomePage.tsx:79)
          in div (at HomePage.tsx:78)
          in HomePage (at App.tsx:27)
          in Route (at App.tsx:23)
          in Switch (at App.tsx:22)
          in Suspense (at App.tsx:21)
          in _default (at AppPage.tsx:31)
          in Router (at AppPage.tsx:30)
          in WrapperComponent

It's probably because I'm setting muted on the video which is needed to have the video autoplay on mobile.

It's annoying but not a high-priority issue -- I'm planning on replacing the video with something more interactive anyways.