I updated a live version from 1.58 to 1.74 and suddenly got errors like:

Error 075 ((USD/JPY::S)): Can't open 3@106.03 at 02:41:09

in MT4-Log I find:

2018.02.16 03:41:18.448 Zorro EURUSD,H4: Order failed - invalid trade volume
2018.02.16 03:41:18.448 Zorro EURUSD,H4: Open USDJPY 0.03@106.01 stop 110.51 slp 10 magic 42380 factor 10


Why did MT4 interpreted Zorro's 3 lots as 0.03 lots or what has changed from 1.58 to 1.74 that could cause this?