Section headers ignore list delegate size changes when "colliding"

Run the attached qml
Scroll down to, and click on, the name "Azzie" to expand the item
Scroll the list up such that the B section header is directly underneath the A section header
Click on the name "Babara" to expand it

The B section header will slide behind the A section header - likely because the previous list item has collapsed. It would be favourable if the headers recognised this and stopped moving when the edges meet.