MQL5 Strategy Tester changes Start Time to bar previous to current bar

 
MQL5 Strategy Tester changes Start Time to bar previous to current bar. Start Time can be set weeks, months or even years earlier, but it still changes. So far, it is happening in higher timeframes (Monthly, Weekly). Why does this occur and how can it be prevented?
 

Good question. I am seeing this myself on Daily charts, too. Extensive search on Google and here brought up only topics with the same question, but no answers.

Looks like we have to live with that. After all, not much test time is lost anyway.

 
Richard:
MQL5 Strategy Tester changes Start Time to bar previous to current bar. Start Time can be set weeks, months or even years earlier, but it still changes. So far, it is happening in higher timeframes (Monthly, Weekly). Why does this occur and how can it be prevented?
Can you give more details please ? I don't get what you mean.