Unit in numerical question

I cannot set the unit for example to V (for volt) - aber saving the question, the unit is removed.

Dear @HPEclic,

Thank you for identifying this bug! We have fixed this issue and will release the corresponding solution at the latest by the beginning of next week.
Unfortunately, your previously entered units have not been stored correctly and you would have to double check the corresponding questions to make sure that the unit will be correctly shown to the students.

We are sorry for the inconveniences this bug has caused.

Best regards,
Julius Schlapbach
Team KlickerUZH