Hi @Stavripal,
Kindly please be informed that i uploaded the same form that you used at my end was able to download the xls dataset without any issue. Besides, i could also see the repeat group data in a different tab. FYR:
Dataset in xls version: Main dataset
Dataset in xls version: Roster/repeat group dataset
Kindly please be informed that this sometimes happen when you break something while you edit and redeploy your survey project. Please try uploading the same survey project (as a new project) in your account and then see if the issue persists. The issue at this stage should not show up.
Have a great day!