Bug with depends changing the Select widget options

[xavArtley]

Hello:
I encouter a bug with this sample of code

w1 = pn.widgets.StaticText(value='<h1>1</h1>')
w2 = pn.widgets.StaticText(value='<h1>2</h1>')
sel = pn.widgets.Select(value=w1, options={'l1': w1, 'l2': w2})
@pn.depends(sel.param.value)
def widget_displayed(selection):
    return sel.value
    
pn.Column(sel, widget_displayed)

The first selection change (l2) works as expected however if we switch back to the l1 selection this error is triggered:

Python failed with the following traceback: 
d:\python\python37-64\pyenv\py37\lib\site-packages\pyviz_comms-0.7.2-py3.7.egg\pyviz_comms\__init__.py _handle_msg L303
d:\pythonworkspace\modules\panel\panel\viewable.py _comm_change L692
d:\pythonworkspace\modules\panel\panel\viewable.py _change_event L716
d:\pythonworkspace\modules\panel\panel\viewable.py _process_events L706
d:\pythonworkspace\modules\panel\panel\widgets\select.py _process_property_change L109
d:\pythonworkspace\modules\panel\panel\util.py indexOf L67
	ValueError: StaticText(value='<h1>1</h1>') not in list

A workaround is the following code:

w1 = pn.widgets.StaticText(value='<h1>1</h1>')
w2 = pn.widgets.StaticText(value='<h1>2</h1>')
sel = pn.widgets.Select(value=w1, options={'l1': w1, 'l2': w2})
@pn.depends(sel.param.value)
def widget_displayed(selection):
    return pn.Column(sel.value)
    
pn.Column(sel, widget_displayed)

[philippjfr]

This is related to the way updating on a reactive object is handled. Currently what happens is that it reuses the initially displayed object and simply updates it, so w1 is updated with the text from w2. This is obviously pretty problematic and we may well have to disable this optimization.