Save as PDF Microsoft Office files - untitled filename

In macOS Sonoma and Ventura, next day after installing the new OS, I have experienced the following issue: when trying to save a MS Office file (Word/Excel) as pdf (keyboard shortcut named "Save as PDF..." with CMD+P+P), the pdf filename was the original filename. Suddenly, the filename becomes "Untitled.pdf".

After checking many similar topics I didn't get any solution. The printing menu where you choose "Save as pdf" is from the system, not from MS Office. Therefore, I found a strange solving - related to the printer settings - I just put my default printer (Brother DCP-L3550cdw) on default settings. Because it was changed to color by printing a doc and then hour later, the save as pdf option gives me "untitled" issue.

Conclusion: for me worked to put main printer on default settings, now I can save as pdf with original filename automatically.