No highlighted display when using highlighted units

[maximilianfixl]

Problem

I am currently using version 2.3.2 in a Vue 3 (CAPI) TypeScript stack with Quasar Framework. In my case, the use of highlighted-units has no effect on the display (regardless of the color scheme).

<g-gantt-chart
    :chart-end="chartEnd"
    :chart-start="chartStart"
    :color-scheme="($q.dark.isActive ? 'dark' : 'default')"
    :current-time="currentTime"
    :date-format="false"
    :grid="grid"
    :hide-timeaxis="hideTimeAxis"
    :highlight-currentTime="true"
    :highlighted-units="[0, 1, 6, 7, 13, 14]"
    :row-height="35"
    bar-end="endDate"
    bar-start="beginDate"
    label-column-title="Unit"
    label-column-width="40px"
    precision="day"
></g-gantt-chart>

Expected

The vertical grid gutters are expected to be highlighted in color.

Question

Is there anything known about this or do I need to make further configurations?