Form Textbox Not Showing Text

I have a form used to display records read from a dB. The record fields are displayed in textboxes to allow editing. When the form loads, it reads all records from the table and loads the first record to the form - very straighforward. I set the Textbox.Readonly = True after loading the data. I have an "Edit" button that sets the value back to false so that editing can occur.

All fields display correctly apart from the first field textbox where there appears to be no text displayed. If I press the "Edit" button and set the cursor into the textbox and use the arrow key to move left, the text is there. In other words, the text is loaded to the textbox but somehow it is hidden. Now if I move to the next record the field information displays correctly. The problem only occurs when the form is first loaded and the first record is displayed.

Now for the strange part. If I delete that (first) textbox from the form and then re-create it, the weird behavior moves to the next textbox control and the first textbox behaves correctly. I have checked all the properties for the textboxes and made sure they are all the same. I have had this problem before and found the only way to overcome it was to regenerate the entire form again. Does anyone have any clues on what is going astray?