Please help guys, I have been banging my head on the keyboard over this.

Profiling does not work at all on a production build despite doing this.

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if (!isServer && isVercelPreview) {
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			console.log('🔧 profiling enabled');
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			config.resolve.alias['react-dom/client'] = 'react-dom/profiling'; // I have also tried react-dom$
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			config.resolve.alias['scheduler/tracing'] = 'scheduler/tracing-profiling';
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		}

Next 15 15.3.5, React 19.0.0

I often get complaints about mismatched react and react-dom version when trying to do this.