Excel truncates function return when using PyXll

Question

We have a function in python that is called in Excel using PyXll Add-in. To do so, the function is called using this code:

import myfunction
from pyxll import xl_func
import pandas as pd

@xl_func('float[][], float[]', auto_resize=True)
def myfunction_xl(
    x: Iterable,
    y: Iterable,
) -> Tuple[pd.DataFrame, pd.DataFrame, pd.DataFrame]:
    (
        df1,
        df2,
        df3,
    ) = myfunction(x, y)
    return (
        df1,
        df2,
        df3,
    )

This calls the code of myfunction which returns after some computation a tuple of three dataframes of different sizes and columns.

The function call works fine in Excel, however the three dataframes are somehow truncated and not displayed with their content.

The same thing happens when calling some other functions which return a long list. Can you please help me figure out how to fix the display? thanks.