Class specified twice in scale

I have a one-scale schedule displaying the dates. I wish for each day-cell in the scale to contain the class “foo”.
However, when using the method {timeline}_scalex_class, and specifying the class “foo” - “foo” is added twice to my header element

scheduler.plugins({
            timeline: true
        });
        var sections = [{ key: 1, label: 'James Smith' }];
        scheduler.createTimelineView({
            name: 'timeline',
            x_unit: 'minute',
            x_date: '%H:%i',
            x_step: 30,
            x_size: 24,
            x_start: 16,
            x_length: 48,
            y_unit: sections,
            y_property: 'section_id',
            render: 'bar'
        });
        scheduler.init('scheduler_here', new Date(2022, 5, 30), 'timeline');
        scheduler.parse([
            { start_date: '2022-06-30 09:00', end_date: '2022-06-30 12:00', text: 'Task A-12458', section_id: 1 },
            { start_date: '2022-06-30 10:00', end_date: '2022-06-30 16:00', text: 'Task A-89411', section_id: 1 },
            { start_date: '2022-06-30 10:00', end_date: '2022-06-30 14:00', text: 'Task A-64168', section_id: 1 },
            { start_date: '2022-06-30 16:00', end_date: '2022-06-30 17:00', text: 'Task A-46598', section_id: 1 }
        ]);

        scheduler.templates.timeline_scalex_class = function (date) {
            return 'foo';
        };

When inspecting the DOM one gets:

13:30
Where the "foo" class is specified twice

Is there any simple way of only getting the class added once, i.e. to get

13:30
?

Hello @sarajaderbrink,

It’s known issue, which is occurs cause of some additional repaints of the timeline view. Unfortunately, there is no ETA when it will be fixed, but I will notify you of any updates.

Does this issue break any of your project functionality, and how, if so? As it may be helpful as additional details for dev team.

Kind regards,