Sprites not shown in gantt chart

Question

Sprites are not shown in a Gantt diagram, but they are shown in notes, though.

For example:

@startgantt
<style>
ganttDiagram {
    task {
        FontSize 32
    }
</style>
sprite $foo1 {
  FFFFFFFFFFFFFFF
  F0123456789ABCF
  F0123456789ABCF
  F0123456789ABCF
  F0123456789ABCF
  F0123456789ABCF
  F0123456789ABCF
  F0123456789ABCF
  F0123456789ABCF
  FFFFFFFFFFFFFFF
}

Project starts 2024-04-01
[foo <$foo1> bar] starts 2024-04-01 and ends 2024-04-10
note bottom
<$foo1>
end note
@endgantt

(image)

I would expect the sprite to be shown between 'foo' and 'bar' in the actual item.