Report Control - BUG: Wrong position for group row summaries

for (int i = 0; i < TheRows->GetCount(); i++) {
    CXTPReportRow* TheRow = TheRows->GetAt(i);

    if (TheRow->IsGroupRow()) {
      CXTPReportGroupRow* GroupRow = reinterpret_cast<CXTPReportGroupRow*>(TheRow);

      double Value=0.0;
      
      Value=DoCalculateChildren(TransactionType, GroupRow->GetChilds(), 0.0);
     ...

      NumberFormatter_.str(L"");
      NumberFormatter_ << std::dec << std::fixed << std::setprecision(Precision) << round(Value, Precision);

      auto GroupCaption=fmt::format(L"{} [{}] {} {}", GroupRow->GetCaption().GetString(), Column, NumberFormatter_.str(), Unit);

      GroupRow->SetCaption(GroupCaption.c_str());
      GroupRow->SetFormula(L"x");
    }
  }

Calculation of the summaries for each level and formatting for the group captions including the summary column is correct, but the the higher the level of the group row the more is the caption of the summary column shifted to the right. In level 0 (first group row) the placement is ok!