Streamlit session state keeps resetting when doing actions quickly (Kubernetes deployment)

[pvieito]

Hi! It seems that my Streamlit script keeps resetting its state when deployed on a Kubernetes cluster, but performs as expected on my local machine. This demo script shows the problem:

import time

import streamlit as st
import pandas as pd

def render_dashboard(**_kwargs):
    time.sleep(1)
    value = st.number_input("Number")
    st.write(value)


render_dashboard()

When I push the increase number button quickly Streamlit resets the state after some number of clicks (see the attached video). This does not affect the script when running locally.

Video: https://transfer.sh/j2S37c/streamlit-bug.mov

[fdubinski]

Very interesting… does it look like a similar issue as this?

Bug causing widget reset

We have recently come across a weird bug in streamlit that we haven’t been able to fully understand. Overall, it looks as if the app widget states get reset while some heavy computation takes place. We tried to come up with a minimal example (and a video in order to show the behavior). [Trimmed_Streamlit_Bug_Recording] If a user clicks makes a lot if quick selections in Selection 2, they will likely trigger some sort of general reset and all the previous selections will be lost. In other wo…

We have also noticed very strange behavior with state resetting on heavy calculations.

[fdubinski]

Also, we opened an issue on github: Widget Reset on heavy calculations · Issue #4836 · streamlit/streamlit · GitHub

If it feels that the issue is similar, we should probably join efforts on this.