Comment 4 for bug 1780463

Note for latter reproducers, trivial command series that will reproduce this after having smb.conf set up as (like above):

[storage]
        comment = testshare
        path = /storage
        #vfs objects = recycle full_audit
        vfs objects = full_audit recycle
        #vfs objects = recycle
        read only = no
        guest ok = yes
        full_audit:prefix = %u|%I
        full_audit:success = unlink
        full_audit:failure = non

$ sudo umount /mnt/test; sudo systemctl stop smbd; sudo rm -rf /storage /mnt/test; sudo mkdir /storage /mnt/test; sudo touch /storage/testfile; sudo chmod -R ogu+w /storage/; sudo systemctl start smbd; sleep 2s; sudo mount -t cifs //127.0.0.1/storage /mnt/test/ -o username=ubuntu,password=ubuntu,uid=1000,gid=1000; ll /storage/testfile /mnt/test/testfile; ls -laF /mnt/test/.recycle; rm /mnt/test/testfile; sleep 2s; ls -dl /mnt/test/.recycle/*

In the good case that will show:
# check after mount
-rwxr-xr-x 1 ubuntu ubuntu 0 Jun 13 10:02 /mnt/test/testfile*
-rw-rw-rw- 1 root root 0 Jun 13 10:02 /storage/testfile
# not there before removal
ls: cannot access '/mnt/test/.recycle': No such file or directory
# recycle worked
-rwxr-xr-x 1 ubuntu ubuntu 0 Jun 13 10:02 /mnt/test/.recycle/testfile

Jammy: 2:4.15.5~dfsg-0ubuntu5 - working
Focal: 2:4.13.17~dfsg-0ubuntu0.21.04.2 - working
Bionic: 2:4.7.6+dfsg~ubuntu-0ubuntu2 - working
Xenial: 2:4.3.11+dfsg-0ubuntu0.16.04.34 - working as well

In Xenial I tried all three variants of
        vfs objects = recycle full_audit
        vfs objects = full_audit recycle
        vfs objects = recycle
And all three worked.