Workload Widget doesn't recognize mirrored People Columns

I wanted to make a specific project board for our project managers where they can assign people for specific items/tasks, and another High level board where the people, statuses and timelines would be compiled from all the project managers boards to calculate workload and have a overall overview.
Unfortunately, when a People Column is mirrored in another board, half of all the functions/widgets and charts don’t see it as a People Column (mainly and most importantly the Workload widget) …

Is there a plan to incorporate/change that and is there a workaround atm?

Thanks in Advance