Custom Map: background image pan and zoom

Hello,
Thanks anybody for LibreNMS, is a magnificent tool.
Custom Maps are so useful (thanks so much @murrant) and map pan and zoom is an excellent feature (thanks a lot @eskyuu).
I would say that it only needs a small improvement. If a background image exist, zoom and pan will not work on it. Only nodes and links are zooming or panning.
It will be very useful if the pan and zoom work to the background image too and follow the nodes and links.

Nobody has the same issue? am i doing something wrong?