Deleting a key from Session State WILL ~~not~~ revert the widget to a default value

[Varos8]

The following statement in the docs dont seem to be true to me. I cant replicate the behaviour stated.

Doc Page: https://docs.streamlit.io/develop/concepts/architecture/widget-behavior
"

Calling a widget command when the widget already exists

When rerunning a script without changing a widget's identity:

Streamlit will connect to the existing frontend and backend parts.
If the widget has a key that was deleted from st.session_state, then Streamlit will recreate the key using the current frontend value. This is because deleting a key from Session State will not revert the widget to a default value.
The widget command will return the current value of the widge
"

Here is the code I used to replicate the stated behaviour:
"

import streamlit as st

st.title("Streamlit Widget Behavior Demo")

if "my_slider" in st.session_state:
del st.session_state["my_slider"]

Initialize a widget with a key.,

current_val = st.slider("Move this slider:", min_value=0, max_value=100, value=0, key="my_slider")

Display the current state

st.write(f"The widget command returned: {current_val}")
st.write("Current st.session_state contents:", st.session_state.to_dict())

"

The widget command does return the default value if the related key is deleted beforehand.
Please explain to me why this is the case if I misunderstodd the docs.