I have a number of hotspots defined and custom icons for them.
When a hotspot is clicked on in the map view the detail panel appears (which is expected) but the icon in the map gets overlaid with a standard marker icon.

How can this marker icon be removed or not displayed?

For an example to explain the issue, please see https://blankcanvasweddings.co.uk/hotspots-map-all-venues

Click on the icon near 'Reading' for 'Little Park Farm'
The panel at the bottom of the map appears, but the marker icon for Little Park Farm has a jumping red marker shown overlaying it. It is this that I need to remove.