Hi @rholdorp,
Welcome to the community! Would you mind having a look at the workaround that i have tried out. It should solve your issue:
In the survey tab of your xlsform:
In the choices tab of your xlsform:
In the settings tab of your xlsform:

Data entry screen as seen in Enketo:
Reference xlsform:
Matrix Questions with Cascading Selects.xls (49.5 KB)
Have a great day!



