Hey guys!
Just spent a lot of time fighting an obscure bug that was introduced to our code base when we added pubnub/react as a dependency. I've done a thorough investigation and am confident that the ts-invariant dependency is the issue. I've already raised it with @benjamn and friends over there, but thought y'all might want to know too :)
Link to the related issue on ts-invariant apollographql/invariant-packages#107