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Serious bug in backtester?

Here is a sample algorithm. It posts a loss of around 100K between 18th July and 21st July 2015. When I look at the transactions there are no transactions for 21st July on some stocks. When I look at daily positions for 21st July 2015, some positions from 18th July have disappeared. Please look into it.

Clone Algorithm
580
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Backtest from to with initial capital
Total Returns
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Alpha
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Beta
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Sharpe
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Sortino
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Max Drawdown
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Benchmark Returns
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Volatility
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Returns 1 Month 3 Month 6 Month 12 Month
Alpha 1 Month 3 Month 6 Month 12 Month
Beta 1 Month 3 Month 6 Month 12 Month
Sharpe 1 Month 3 Month 6 Month 12 Month
Sortino 1 Month 3 Month 6 Month 12 Month
Volatility 1 Month 3 Month 6 Month 12 Month
Max Drawdown 1 Month 3 Month 6 Month 12 Month
# Backtest ID: 5993bd8d78a33551029cc84d
There was a runtime error.