I’m also having the same problem of missing data for a few Ranking questions. My questionnaire is similarly also not in English (it’s in Thai and Burmese). The downloaded data in xls shows blank columns for certain questions, even though they are mandatory.
@ayasalhany I used API Connector to import the data into Google sheets. Using this method I can see the missing responses, and I then downloaded the complete file through Google sheets.
This is just a temporary workaround, but it would be good to find out what the problem is. Thank you!