I got a problem with Zorro. I load 1 min MNQ data and it shows the exact same bars as my other platform from where I exported the data (TimeZone is set to UTC on my platform and the session start is 13:30). If I chose to draw 20min bars in zorro, the bars drawn are off, they are completely different. If I chose for example 30min bars, they will be correctly calculated again, with 60min bars off, 90min bars correct.

Does someone have an idea why is this happening?