Replied 3 August 2017, 3:21 pm EST
Yes, you are right when you place the Subreport into a table row, it does not shows to have a height property as now it is a part of a table and its height is set according to the height of the TableRow. Moreover neither the TableRow nor the SubReport have a CanGrow property that you could set to avoid the overlapping as the subreport automatically grows to accommodate the data in it.
So, I do not find a reason why they are overlapping, so I would suggest you to test the issue with the latest version of Data Dynamics Reports i.e.v 1.6.2260.3, which you can download from the following link:
However, if you still face the same issue, I would request you to provide me with your rdlx file and some sample data, so that I can replicate the issue at my end and debug it further.