Since the upgrade to React 19, widget initialization (most notably affecting group calls) has been broken in development mode. This is because React now executes all callback refs twice, and the callback ref that receives the widget's iframe was not prepared to deal with that. I've fixed this by creating and attaching the iframe to the DOM in the callback ref, which allows us to properly couple its lifetime to that of the StopGapWidget. I've also added some insurance against strict mode-style races in StopGapWidget (doesn't hurt).
RobinandGitHub
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