Cannot merge / create PDF in mounted volume (MacOS)

I’m on Cryptomator v1.6.5, MacOS Monterey 12.2.1. I’m not sure if the issue I’m facing existed before I upgraded to Monterey, but I recall previously that I could select two or more PDF files within my mounted volume, right click > quick action > create PDF, and the selected PDFs would be merged into a single new PDF.

Somehow it seems like that doesn’t work anymore – when I select “create PDF”, I could hear the sound effect from MacOS that a new PDF is created, but no new file appears in the folder. I have to move the original selected PDFs out of the Crytomator volume, merge, then bring the new file back in again.

[Edit: just to add that I’m using MacFuse 4.2.4, if that helps]