Cannot see container logs in Rancher UI when fluentd is activated

We installed Logging (v100.1.2+up3.17.4) on the (RKE1) based cluster using rancher 2.6.5. Logs are received by the logging server, but they are no longer visible in the Rancher UI with my more privileged user while I can see them with the less privileged user. I can still see logs when using kubectl with both users. This was not the case, until we upgraded from RKE1 v.1.20 to RKE1 v1.23.7.

The more privileged User has
Cluster Owner

The less privileged User has
Cluster Member
Project Member

What is RBAC role am I missing?

Best, Peter