This is because at the moment, you can’t target a given Dash component as “Output” via more than one input/callbacks. When you try to run your sample code, you should see this error message on page load:
In the callback for output(s):
text.children
Output 0 (text.children) is already in use.
Any given output can only have one callback that sets it.
To resolve this situation, try combining these into
one callback function, distinguishing the trigger
by usingdash.callback_contextif necessary.
To get around this, you can either use the “multiple inputs” approach documented here: Part 2. Basic Callbacks | Dash for Python Documentation | Plotly
Or take a look at this work from Emil: Multiple callbacks for an output - #4 by DeejL