DiscreteSlider label not updated in ReactiveHTML layout

[xavArtley]

Hello,
DiscreteSlider label is not updated in ReactiveHTML layout

class CustomLayout(pn.reactive.ReactiveHTML):
    
    elem = param.Parameter()
    
    _template = """
        <div id="custom">${elem}</div>
    """
slider = pn.widgets.DiscreteSlider(value=1, options=[1,2,3])
pn.Row(CustomLayout(elem=slider),  slider)

[philippjfr]

Fixed by #3278. Note that the example above still doesn't work because of #552