LO Calc: italic text not shown in exported PDF

LO v24.8.4.2 Calc (Windows 11)
When exporting .ods to PDF, italic text is not always shown, but the cell stays remains blank.
But when I chage the title column from bold to bold-italic then all the italic text appears in the exported PDF as expected.
‘Apps P8LITE TEST1’ (.ods & .pdf) is the case where the italic text is missing.
‘Apps P8LITE TEST2’ (.ods & .pdf) is the case where the italic text is appearing.
The problem started with release 24.8.1.2
I reinstalled rel 24.8.4.2 from scratch to reproduce the case.
Apps P8LITE TEST1.ods (23.4 KB)
Apps P8LITE TEST1.pdf (78.4 KB)
Apps P8LITE TEST2.ods (23.5 KB)
Apps P8LITE TEST2.pdf (91.3 KB)
Rgds, Francis