Thanks to @Steve-Mcl I have removed my loop nodes and replace them with functions.
I want to remove the loop node from the palette, but it appears to still be "in use"
When I search in the flows where it is used I have:
However when I click on msg.array it should open the page where this node is and blink with red around it. It does nothing....
When I look in the flows.json, I can see the msg.array but not in the "normal" interface.
How can I find this "zombie" node ?