rxdbGrid : pb with memo

[folkeu08]

Good morning,
I use RXdbGrid in my screens to display memos and I check the "dgDisplayMemoText" option in the grid settings.
When displayed, I have an offset from the top border and the entire memo is not displayed, the last line is cropped although I have indicated a cell height greater than the desired display.
Has anyone encountered this problem before and how to resolve it?
Under Delphi, I tried with SMdbGrid, the problem does not appear.
Will there be another advanced DBGrid component like rxdbGrid allowing you to put column titles on several lines?
Has anyone taken over SMdbGrid under Lazarus?
Thanks.