We're using a TextBox which RichText.Text property is binded to a property that could contain inline tags. We created a tag that changes the FontFamily to use a font icon.
The icons are being rendered correctly, but we realized that if we remove the interaction by setting the IsEnabled to false, the drawn icon still detects the interaction.

For example (see the video), we have some world icons (using a TextBox with a font icon) that we want to remove their interaction since hovering or clicking them doesn't nothing (and there are objects behind them, the wall, that we want to interact). We set the IsHitTestVisible and IsEnabled propeties to false. However, when we try to interact with the object behind the icon, we can't since the icon is detecting the interaction.

This is how we are setting the text to print the icon:
<Viewbox IsHitTestVisible="False" IsEnabled="False">
<TextBlock noesis:RichText.Text="{Binding Text}" Foreground="{TemplateBinding Foreground}"/>
</Viewbox>

THen, this is an inline tag with a font icon we created:
<Style x:Key="FontMapIcon" TargetType="{x:Type Inline}">
<Setter Property="FontFamily" Value="{DynamicResource Font.Family.Map.Icon}"/>
</Style>

And the binded Text could be something like <FontMapIcon>A</>

We investigated this a bit and we found that changing the IsEnabled property in the newly created Run component (the ParseText method in RichText.cpp) fixes the problem (see attached image).