Enlarge a text to exceed its row height, the text will not be exported to PDF

Reproducing Steps:

1. enter some text in a blank sheet
2. enlarge a cell's font size and adjust its row height to smaller than text height like below

3. export to PDF

Actual:
the text "aaaa" disappears in exported PDF.

Expected:
the text "aaaa" should be exported to the PDF.

Work-around:
enlarge the row height can dismiss the issue.