Shared directory permissions after Catalina update-

Greetings folks-
I have a Ubuntu 18.04 VM that runs on one of my Catalina 10.15.1 machines.

• On the macOS side, I use iCloud to host my Documents and Desktop.
• On the VM side I request to share the home directory.
• On the unix side, I _appear_ to have read-write permissions on my Downloads directory.
• Indeed I can read and write via the terminal.
• However, when I try to download files there via, say, Chrome, I get write permission denied.

Makes me wonder if the 'avenue' that the desktop apps access the shared directories is different than raw, straight up access? I know that ubuntu does some stuff to make the paths 'nice' (`/media/psf/meh` sorts of stuff). Anyone else have any experience with this? Annoying but not critical (yet)

 

Pardon the self-follow-up, but it may very well have something to do with the whole new 'snap' package management thing that Ubuntu 18+ includes. I'm 100x unfamiliar with it, but noticed that programs distributed this way (like chrome) have trouble with those shared directories. I'll dig further and report back -