We have a free cloud instance with one working classic project and one working next-gen project.
We have created a (actually several in attempting to find the issue) new "Kanban" and/or "Scrum" classic project. All columns have mapped statuses. the board filter is scoped to the new project. Not trying to do anything fancy like multi-project filters,etc. Just a basic, single project config.
The issue:
The planning view displays counts of tasks/stories etc. as they are created against Epics but will not actually display any of these work items in either the planning view or the board view. Have had several different, experienced, internal resources look at the instance configs and no one has been able to find the problem. Only the "next-gen" project config provides working boards at this time.