I think you need to take a look at the option called
'Stretch with overflow' under the formatting section. This basically means it will stretch if the text in the cell is bigger than the cell at its current size.
In the print control section you should select the strech type to be 'relative to band height'. This will then make the cell the same height as the largest cell.
I'm having the same issue with OP. I set Stretch with Overflow to true and relative to band height but they don't help. Any other suggestions?
Thank you very much.