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Description of problem:
For volumes inside the containers the container UUID is reported instead of volume UUID. Bug has been caused by:
https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=b6180160f78f0182b296bdceed6419b26a6fccc7

Fix is already in upstream.

How reproducible:
Always

Steps to Reproduce:
1. Create container and volume inside it.
   mdadm -CR imsm0 -e imsm -n 2 /dev/sd[ab]
   mdadm -CR vol -l1 -n2 /dev/sd[ab]
2. check mdadm --detail output for volume and container
  mdadm -D /dev/md/vol
  mdadm -D /dev/md/imsm0
Actual results:
Reported UUIDs are the same.

Expected results:
UUIDs are different.

Hello,
the issue is fixed by:
https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=b771faef931c798a4553db0a8c1366aff90079c6

Thanks,
Mariusz

Are there any updates regarding this issue?

Thanks
Pawel

Hi Pawel

This bug has been fixed in mdadm-4.1-12.el8.

*** This bug has been marked as a duplicate of bug 1800521 ***