GetMarketSeries not loading enough data

Dear Spotware,

please see following example:

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class Test : Indicator
    {
        private MarketSeries m3;
        private MarketSeries m15;
        private MarketSeries h1;

        protected override void Initialize()
        {
            // Initialize and create nested indicators
            m3 = MarketSeries;
            // Set Chart-TimeFrame to m3 !
            m15 = MarketData.GetSeries(TimeFrame.Minute15);
            h1 = MarketData.GetSeries(TimeFrame.Hour);

            Print("First m3 OpenTime " + m3.OpenTime[0]);
            Print("First m15 OpenTime " + m15.OpenTime[0]);
            Print("First h1 OpenTime " + h1.OpenTime[0]);
        }

        public override void Calculate(int index)
        {
            // Calculate value at specified index
            // Result[index] = ...                   
        }
    }
}

And here is the output.

Initial-output:

31/10/2017 11:20:11.796 First m3 OpenTime 25.10.2017 06:18:00

31/10/2017 11:20:11.796 First m15 OpenTime 25.06.2017 21:00:00

31/10/2017 11:20:11.796 First h1 OpenTime 26.05.2016 21:00:00

Output after scrolling in the chart to left (so more past data is loaded):

31/10/2017 11:22:34.514 First m3 OpenTime 14.06.2017 06:18:00 -> Changed, of course, because it is the Chart-TimeFrame

31/10/2017 11:22:34.514 First m15 OpenTime 25.06.2017 21:00:00 -> Did not change, but it should be loaded data also until something before or equal 14.06.2017 06:18:00, so there is NOT enough data loaded

31/10/2017 11:22:34.514 First h1 OpenTime 26.05.2016 21:00:00 -> Did not change, because it is still in past, so enough data

The same problem exists if using this in a bot, so if my backtesting date is from e.g. 01.01.2017 until 31.03.2017 m15 has also loaded data only until 25.06.2017 21:00:00.

By the way at first i thought there is something wrong with the downloaded data in roaming-dir (e.g. m15 is partly corrupt), but i cleaned / deleted everything and came up to the solution, that it simply does not load enough data.

Could you please help us / me with this challenge?

Thanks in advance.

andi21