openoffice calc - newline causes duplicate value in cells (pandas/openpyxl)

Does anyone know how to workaround a problem of OpenOffice Calc not handling new lines in cells correct?

I have a python script that is dynamically generating an excel workbook using openpyxl via pandas.

The script works fine but when I view cells in OpenOffice that contain newlines all the values are duplicated multiple times. If I open the same file using the Microsoft Excel Viewer everything is displayed correctly and if I use a character other than a new line (e.g. comma, #, etc) it displays fine in both also.

I have a workaround to go into the excel and replace the random character using a macro but would like to avoid that if possible as the process really needs to be completely automated. also because the file will be processed by an another inteal tool, I do need these cells to be processed with a new line and I can't change the character.

I have also tried using chr(10) and/or chr(13) but in the former case it just get's replaced in the output by 'n' anyway as expected.

The code I'm currently using is similar to:

data_df = pd.DataFrame(
          [
            "value1",
            "n".join(['element1','element2','element3']),
            "value3"
          ]
)

fn = r'/path/to/excel/file.xlsx'

writer = pd.ExcelWriter(fn, engine='xlsxwriter')
data_df.to_excel(writer, sheet_name='Data', index=False, header=0)
workbook = writer.book
worksheet = writer.sheets['Data']
worksheet.set_column('A:ZZ',50,
                     workbook.add_format({'text_wrap': True}))
writer.save()

What happens with the Element data is that it shows in the OpenOffice Calc cell as something like:

element1
element1element2element3
element1element2element3
element1element2element3
...
element1element2element3
element1element2element3
element2
element3

The same data viewed as a list or via DataFrame.head() appears fine, it's just when it get passed to the openpyxl library and viewed in OpenOffice.

Thanks