file open dialog fonts are VERY small in 6.4 on Ubuntu

Previously I was running LibreOffice 6.3.3-2 and when I used the file open dialog the resulting file open GUI was “normal” sized in comparison to my screen resolution.

I just upgraded to 6.4.3-2 and now when I click on the open file button or choose Open from the File drop down menu the resulting file open GUI has VERY small fonts and the choices in the GUI are difficult to read.

How can I fix this and why did it change when upgrading from 6.3.3-2 to 6.4.3-2 ?

BTW, I am running an older version of Ubuntu

I can provide a screen shot of the file open GUI window if necessary.

Thanks

BTW, I just de-installed all of the 6.4.3-2 packages and re-installed all of the 6.3.3-2 packages and the file open dialog box is back to normal size.