27 May 2021
Support told us in ticket https://support.dynatrace.com/supportportal/browse/SUP-75063
HAProxy plugin has undocumented limitation. It doesn't work with Openshift.
We would like to be supported in the future.
That's great that you tossed in a support ticket - you can also create a RFE to have the Project Managers see about building that in and updating the documentation.