Component in grid header is not displayed correctly

Vaadin Framework version - 8.24.0
Google Chrome Version 125.0.6422.77 (Official Build) (64-bit)
Windows 11 Enterprise Version 23H2

Component in grid header is not displayed correctly if you set it from background thread.

To reproduce bug you should change header from background thread:

    protected void init(VaadinRequest vaadinRequest) {
        grid.getDefaultHeaderRow().getCell(columnId)
                .setComponent(new HorizontalLayout(new Label("Status")));
        
        CompletableFuture.supplyAsync(() -> {
                    try {
                        Thread.sleep(2000);
                    } catch (InterruptedException ignored) {}
                    return "";
                })
                .whenComplete((s, thr) -> {
                    UI ui = getUI();
                    ui.access(() -> {
                        grid.getDefaultHeaderRow().getCell(columnId)
                                .setComponent(createLayoutForStatusColumnInHeader());
                        ui.push();
                    });
                });
    }
                
    private HorizontalLayout createLayoutForStatusColumnInHeader() {
        Button button = new Button();
        button.addStyleNames(
                ValoTheme.BUTTON_SMALL,
                ValoTheme.BUTTON_ICON_ONLY,
                ValoTheme.BUTTON_BORDERLESS
        );
        button.setIcon(VaadinIcons.REFRESH);
        button.addClickListener(clickEvent -> Notification.show("refresh!"));

        HorizontalLayout horizontalLayout = new HorizontalLayout();
        Label label = new Label("Status");
        horizontalLayout.addComponentsAndExpand(label);
        horizontalLayout.setComponentAlignment(label, Alignment.MIDDLE_CENTER);
        horizontalLayout.addComponent(button);
        horizontalLayout.setComponentAlignment(button, Alignment.MIDDLE_CENTER);
        return horizontalLayout;
    }

Push mode is @Push(value = PushMode.MANUAL, transport = Transport.LONG_POLLING)

Also you can find full code in repo-vaadin8-component-in-grid-header-bug.

Start with the supplied repo-vaadin8-component-in-grid-bug reproducer and the UI.access callback that replaces the Grid header component. Trace the Grid header update path for background-thread changes under manual long-polling push. Done means the replacement header renders correctly and remains interactive after the asynchronous update.