Problem CopyTime for other symbols

I prepared simple script, which prints the open time of current M1 candles for 3 symbols:

#property strict
//---
void OnStart()
  {
//---
   string   CurrPair[3]={"EURUSD","EURGBP","EURJPY"};
   datetime CurrTime[3];
   datetime TimeArr[1];
//---
   for(int i=0;i<3;i++)
     {
      if(CopyTime(CurrPair[i],PERIOD_M1,0,1,TimeArr)!=1) break;
      CurrTime[i]=TimeArr[0];
     }
   for(int i=0;i<3;i++) Print(CurrPair[i],": TimeOpen = ",CurrTime[i]);
  }

I ran it 2 times with different results:

At 18:47:09 (my computer time) the correct result was for EURUSD only, but for other 2 curencies were not (19:44:00, broker's server time, marked red). After 5 seconds, at 18:47:16 (my computer time) open time of M1 candles for all 3 currencies were correct (19:47:00, broker's server time).

Could anyone tell me why it happened and what to do the program copy data for current candle with index [0], not for some previous candle. In general I need to find open price of current candles for several currencies.