Drivesmart 76 not displaying custom POI on map

Hi all, been using a collection of trusty Nuvi 42's as a delivery driver in a large-ish island community for the last few years.

For these devices I created a custom poi file with every house (name and number) on the island, making my job of finding named houses a breeze.

The best part about it was the Nuvi displayed the custom poi icons (I made red circles) on the map view as you're driving along, so you can match up what you see on the satnav to the real world "oh cool its the middle house in this group of 3" or whatever..

So today I got my drivesmart 76, inserted my micro SD, copied over the poi sets using the on screen prompts, so far so good. I can access them through the Where To interface, and search / navigate to them...

But none of the bright red circles display on the 3d view, or the 2d view when I tap the map. (I tried zooming in all the way )

I have tried selecting "more" in the map details setting, and explored the layers setting, no dice.

Apart from this issue I love the new device, but unless I can find a way to display the custom poi icons, it will be relegated to family holidays and I'll buy a 5 inch Nuvi for work .

Notes: when selecting one of my POIs the red icon is displayed in a green box on the map preview screen, so the icons are defo there and readable by the 76.

They are split into 2 categories, one with about 8000 and one with about 6000 points.

The file on my SD card / copied to device was generated using Garmin poi loader from a 4 column CSV, with a bitmap icon.

If anyone has any advice, please reach out.
Thanks.

 

Thanks NN , the icon is good, no concerns there.
So after playing about a bit today (enabling 'up-ahead' in the map layers), SOME of my nice red circle icons are showing perfectly on the 3d map view, but by no means all of them (maybe 20%)... And I can find no rhyme or reason as to why this is so.