From the file manager, right-clicking a file to open it in codium fails?

[explode]

I am using Kubuntu 22.04 (KDE Plasma 5.24.6, Dolphin 21.12.3, snap 2.57.1) and Codium 1.71.2.22258 (installed via snap):

$ snap list
Name        Version           Rev    Tracking        Publisher      Notes
codium      1.71.2.22258      271    latest/stable   vscodium       classic

When I navigate the file manager to a LOCAL folder, right-click any file or subfolder, then (in its context-menu) select Open Folder With and VSCodium... it works as expected. However doing that same procedure for a REMOTE folder (NFS or CIFS) will fail - nothing happens (the file/folder does not open) and $ dmesg shows:

[ 6162.332263] audit: type=1400 audit(1663371568.221:45): apparmor="DENIED" 
operation="sendmsg" profile="/snap/snapd/16778/usr/lib/snapd/snap-confine" 
pid=9331 comm="snap-confine" laddr=192.168.1.8 lport=952 faddr=192.168.1.5 
fport=2049 family="inet" sock_type="stream" protocol=6 requested_mask="send" 
denied_mask="send"

So apparmor blocks it, even though the snap got installed by classic confinement. I've searched the issues/conversations here (github) and elsewhere but maybe I'm missing the obvious fix. Any tips?