How to add Picture or Change Inititals of device tracked items on Map

Hi,
I have found something on customization but that does not seem to work for me. I am on the latestest release on HA installed on docker via ubuntu.

I want to have an image replacing the default (initials for the icons) on the map. I use to have the picture show up but after a few updates months back, it has disappeared and only (icons with initials come up)

What I see today