Unexpected behaviour of reactive.calc

Hello,

I would like to report something that generated unexpected behaviour within a reactive.calc. I have condensed my original problem to a reprex, so some of it might seem a little convoluted but it reproduces the issue

from shiny import reactive
from shiny.express import input, render, ui, session
import random

@reactive.effect
@reactive.event(input.modal)
def _():
    m = ui.modal(  
        ui.input_text("new", "New"),  
        ui.input_action_button("add", "Add"),
        easy_close=True,
        footer=None,  
    )  
    ui.modal_show(m)

@reactive.calc  
@reactive.event(input.add)  
def processNew():
    #Do something ...
    ui.modal_remove()
    return

@reactive.calc
@reactive.event(input.btn, processNew)
def textOut():
    return "Your random number is: " + str(random.random())

ui.input_action_button("btn", "Generate")
ui.input_action_button("modal", "Input")

@render.text
def _():
    return textOut()

When you execute this code, nothing happens if you click the "generate" button. However, as soon as you have used the "Add" button once, it starts working. This most likely is because of the modal window not being there at the start, but this should not prevent the textOut() function from running when input.btn is clicked before the modal is shown for the first time.

Thanks for looking into this

Start by running the supplied minimal Python reprex and tracing the reactive.calc and reactive.event dependencies around processNew and textOut. No repository files or tests are named in the report; done means clicking Generate updates the output before the modal is opened, while the existing Add-button behavior remains correct.