Notice the timestamps between your backtest's logs and notebook differ. Your algorithm prints current values at 9:31am, 9:46am, 10:01am, 10:16am etc, while the resampled pricing data in the notebook has timestamps at 9:45am, 10am, 10:15am, etc.
If you change your context.fct_call to start at 1, the values for resampled pricing data will match between backtest/notebook. However, the number of samples will go from 3 to 2 and will cause RSI to return NaN. You will need to adjust the number of bars you request with data.history to account for this.
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