New docker conatiners are not inheriting mask from /var/lib/docker/containers directory

[alpana17]

Expected behavior

mask should be inherited

Actual behavior

mask is not inherited

Information

file: var/lib/docker/containers
getfacl for it
owner: root
group: root

user::rwx
user:splunk:r-x
group::---
mask::r-x
other::---
default:user::rwx
default:user:splunk:r-x
default:group::---
default😷:r-x
default:other::---

file: var/lib/docker/containers/0defb67a91a6ba373482c013194f2a1b1c3fb737e617d36f6897451b3e0be418
getfacl on it
owner: root
group: root

user::rwx
user:splunk:r-x #effective:---
group::---
mask::---
other::---
default:user::rwx
default:user:splunk:r-x
default:group::---
default😷:r-x
default:other::---

The newly created containers should properly inherent all perms (including mask!) from the parent directory, but they do not. It is not clear to me why this is happening.

Steps to reproduce the behavior

[alpana17]

Gentle Reminder..
It is a blocker for us.
Please guide us, how to proceed