Problem

When displaying an index/multi-index that includes a category datatype, a warning is displayed saying "The value is not part of the allowed options."

I can't find much documentation on this apart from previous closed issues which all seem to say it should work, but this definitely appears to be a Streamlit warning (it even has a "⚠️" next to each cell element)

e.g., st.dataframe(df) where df.index has dtype == "category"

Solutions

My current temporary solution is just to reset the index, but then you lose the Excel-like frozen column scrolling...

i.e., st.dataframe(df.reset_index()) gets rid of the warning at least.

Additional context

May be linked to:
#47, #453, #4927

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