Data Editor bug when used in a streamlit form

Using Streamlit
,
1

Hi!

I wanted to use a data editor inside of a form but I am running into a bug. Here is a mock example of my code:

df2 = pd.DataFrame([
    {"ID": 1, "NAME": "Guillaume"}, 
    {"ID": 2, "NAME": "Tim"}, 
    {"ID": 3, "NAME": "me"},
    {"ID": 4, "NAME": "aname2"},
    {"ID": 5, "NAME": "aname"}
])
df2["NAME"] = df2["NAME"].astype("string")


with st.form(key="edit_table2"):
    new_df2 = st.data_editor(df2, num_rows="dynamic", key="new_df2")
    submitted = st.form_submit_button("Submit2")

st.write(new_df2)

Unfortunately when I

  1. Add a row
  2. Modify a row
  3. Delete a row

The data editor does not register all my changes. Please see the video:

Additional info:

  1. The app is running locally
  2. No error message is displayed
  3. Streamlit 1.44.1, Python 3.11
2

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