Don't place new items next to pinned one

I use the following combination of settings:
— Don't group
— When not grouping, place new items next to existing ones
— Don't group pinned items

I have my pinned items at the left side of the bar. When I click a pinned item, a new item appears next to it, among other pinned items.
It would be great to have an option to place new items next to existing ones, but not to pinned ones, leaving pinned items together.