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Your issue might have different sources. This could be due to data thresholds or data sampling in Google Analytics 4 (GA4) causing data discrepancies between real-time and historical data. This feature of GA4 helps protect user privacy, but can cause changes or distortions in the reported data. It could also be the result of a delay in the processing of data into BigQuery. Sometimes, you might see data in the intraday table that hasn’t yet appeared in the daily table because BigQuery processes large data sequentially and intraday data sooner than the rest. A third potential cause could be a technical glitch in GA4 or BigQuery leading to data loss. They are complex systems and occasionally do experience such issues. In all cases, you should reach out to Google support to investigate the matter further.
