workshop assessment form cannot be submitted via android browser when grading with comments strategy

Moodle version 3.2

Activity: workshop

I set several questions with comments grading strategy.

On the student interface they had they were obliged to choose an option from a dropdown menu besides providing the comment.

The issue is that the dropdown menu sais "options" with no options to choose from. Therefore they could not submit the form, impeding the assessment.

They were using their cellphones to do the activity, via browser.