My screenshot IS all from Zorro. You can see the simple script on the left, EUR/JPY prices downloaded from IB open in the Zorro History editor and Zorro log just beneath it.

The discrepancy is in the very first bar on Sun, timestamped 21:21 ( I provided a description when attaching a screenshot - but it is not publicly visible).

I highlighted yellow the 1-min bars/prices which should constitute this 5-min bar.

Its close price should be 119.251, not 119.1365 (in log).

The last 5-min candle on Fri is correct, but the first bar on Sun 03/08 has the same problem.