For now, put a blank line before your image in the text, to have a result like the left-hand result below:
OK, I realise the inline image doesn’t fill the whole icon but the Title is kept out of the way. Beyond that, you need a feature request.
Or, with no line before the image in text (right-hand example above) you could set $TitleOpacity for the note to 0 (zero) with this result:
This note still has a title ($Name value) but is it rendered transparently in the map icon.