Ag grid rowSelected event freeze or reload the entire page

[masykur8d]

When having a lot of rows in ag grid, rowSelected event will fires as many as the number of row when the select all checkbox is checked.
In this case, until all the rowSelected event finish, other event cannot be run. Is this the expected behaviour?
On some other more complex apps, the entire page is reload automatically and sometimes the websocket connection were lost.

I am using the code below:

import justpy as jp
import pandas as pd
import time

# wm_df = pd.read_csv('https://elimintz.github.io/women_majors.csv').round(2)

def row_selected4(self, msg):
    print(msg.selected)
    wp = msg.page
    if msg.selected:
        wp.selected_rows[msg.rowIndex] = msg.data
    else:
        wp.selected_rows.pop(msg.rowIndex)
    s = f'Selected rows {sorted(list(wp.selected_rows.keys()))}'
    for i in sorted(wp.selected_rows):
        s = f'{s}\n Row {i}  Data: {wp.selected_rows[i]}'
    if wp.selected_rows:
        wp.rows_div.text = s
    else:
        wp.rows_div.text = 'No row selected'


def grid_test13():
    wp = jp.QuasarPage()
    wp.selected_rows = {}  # Dictionary holding selected rows
    list1 = []
    for i in range(1000):
        list1.append({'No.':f'{i}', 'Column Name':f'Column Name {i}'})
    df = pd.DataFrame(list1)
    grid = jp.AgGrid(a=wp, style='height: 200px; width: 300px; margin: 0.25em')
    grid.load_pandas_frame(df)
    grid.options.columnDefs[0].checkboxSelection = True
    grid.options.defaultColDef.filter = True
    grid.options.defaultColDef.sortable = True
    grid.options.rowSelection = 'multiple'
    grid.options.columnDefs[0].checkboxSelection = True
    grid.options.columnDefs[0].headerCheckboxSelection = True
    grid.options.columnDefs[0].headerCheckboxSelectionFilteredOnly = True
    grid.on('rowSelected', row_selected4)
        
    def btn_event2(self, msg):
        btn1.loading = not btn1.loading

    btn1 = jp.QBtn(loading=False, flat=True, label='Download', color='primary', a=wp)
    btn2 = jp.QBtn(loading=False, flat=True, label='Toogle Loding', color='primary', a=wp)
    btn2.btn1 = btn1
    btn2.on('click', btn_event2)

    wp.rows_div = jp.Pre(text='Data will go here when you select rows', classes='border text-lg', a=wp)

    return wp

jp.justpy(grid_test13)

I am thinking of using async/await function but I am not sure which part should be awaited.
Btw, I believe this is a JustPy only related matter so I did not post it to stackoverflow or anywhere else.