Has anything changed in release 23.12 with respect to approvals sync

Summary:

An issue with the approvals hierarchy synchronisation that we have been trying to resolve in our prod environments is no longer appearing in the test ones. Has anything changed in the latest release?

Content (please ensure you mask any confidential information):

We have been investigating an issue with the approvals hierarchy synchronisation in our prod class environments. We have seen this in two of the prod environments. Having cloned prod to a test environment the issue has been resolved. We repeated this to the other test environment and that is resolved too. There was nothing in the release notes but is anyone aware of why this might be happening?