Scheduler shows different values than what being rendered by onBeforeTimeHeaderDomAdd

Hello,

Issue: I have a placeholder component to render in `onBeforeTimeHeaderDomAdd`, but instead of showing the “TODO” placeholder like I intended, it shows the default formatted dates instead (circled in red).

Once I scroll to the right, those numbers are rendered with the correct “TODO” placeholder component, but then the next month/date shows the default formatted dates (ie: January 2026 will show “January 2026”, and not “TODO Month only label“ (our JSX).

This is my configuration object.

{
    "scale": "Week",
    "cellWidth": 267,
    "days": 365,
    "infiniteScrollingEnabled": true,
    "infiniteScrollingMargin": 21,
    "infiniteScrollingStepDays": 180,
    "timeHeaders": [
        {
            "groupBy": "Month"
        },
        {
            "groupBy": "Week"
        }
    ]
}

This is my snippet for `onBeforeTimeHeaderDomAdd`. We use this instead of `on…Render` because we need to render complex JSX, including custom format of the dates.

  const onBeforeTimeHeaderDomAdd = useCallback(
    (args) => {
      args.element = <TodoPlaceholderTimeHeader {...args} /> 
      // TODO - currently hard-coded with "TODO - [...] Label"
    },
    []
  );

Looking forward to the advice on going about this!