I feel like an idiot as I have to say to the client: I can't fix it. I can report it and pray for a fix.
Just after I had a similar issues yesterday: You can't vertically align the text in a listbox activecell. So if the row height is 30 pixels, the text in the cell is jumping up if you click on it. See Feedback report 13098
This are the little stitches which may over time let the client move to another developer which uses another tool.