I have set SeparateHoldings and OpacSeparateHoldings each to "separate", but I no longer see the different tabs for items at 'my' library and the other libraries.
I don't recreate on master.
The preferences are working correctly for me on master (I thought it wasn't for a moment, but there were no items for my current home branch).
Thx! I have an idea, I will double check and then probably this can be closed.