In general, we don't recommend changing the report definition settings at run-time.
When working with reports programmatically, you need to set the ReportItem.Size and ReportItem.Location properties explicitly for each report item that you add to the report. Otherwise, we cannot guarantee where items will be positioned in their containers.
If that is not the case, please send us the report definition that demonstrates the issue, so we can check its settings and provide more accurate suggestions.
Let us know if you have any additional questions.
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