Something is wrong when loading an image

[Palollo]

How to reproduce:

Write down the dockerfile:

FROM ubuntu:22.04

WORKDIR /tmp
RUN adduser ds
WORKDIR /home/ds

It is the simplest dockerfile I've found to reproduce the problem.

Then build:
docker build -t test:01 .

And save to a file:
docker save test:01 -o test01.tar

Now when loading with udocker...

~$ udocker load -i test01.tar
Info: adding layer: sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef
Info: adding layer: sha256:47aeb7235dccda9e3b903c458276060ca6b90b4a82e00221b32462982fd98248
Info: adding layer: sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef
[]

Note there is not a name assigned within the square brackets at the end.
That's the first symptom that something is wrong.

It is appearing when the the images are listed:

~$ udocker images
REPOSITORY
9b87adf5eaea450f:01    .

But when we inspect it:

~$ udocker inspect 9b87adf5eaea450f:01
Error: image or container not found 9b87adf5eaea450f:01

And when we verify all is good:

~$ udocker verify 9b87adf5eaea450f:01
Info: verifying: 9b87adf5eaea450f:01
Info: loading structure
Info: verifying layers
Info: layer ok: 5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef
Info: layer ok: 47aeb7235dccda9e3b903c458276060ca6b90b4a82e00221b32462982fd98248
Info: image Ok

And finally if we create a container:

~$ udocker create 9b87adf5eaea450f:01
Error: create container: getting layers or json

What's going on?

Probably related #443