When I am performing a snapshot of a single file, rather than from a directory, the resulting snapshot starts with “Ix…” and is not visible afterwards in either KopiaUI or in the CLI, although the data has been transferred to the repository.
If this is not supported, selecting a single file shouldn’t be allowed… or it may be a bug. Here’s an example:
root@pandora:~# kopia snapshot /mnt/pve/vmBackup/template/iso/CentOS-Stream-8-x86_64-20191219-boot.iso
Snapshotting root@pandora:/mnt/pve/vmBackup/template/iso/CentOS-Stream-8-x86_64-20191219-boot.iso ...
* 0 hashing, 1 hashed (626 MB), 0 cached (0 B), 0 uploaded (0 B), 0 errors
Created snapshot with root Ixf6c717bd9fc25ec003257fcaaa4f50fa and ID c40a4437925ad4963cbdd9b328d66af2 in 13s
That is a CLI bug, it currently only allows you to delete using object IDs which are directory IDs. There’s a workaround, you should be able to list snapshots with manifests and delete by manifest ID: