When trying to add INDIVIDUAL details to a camping event because not everyone stayed the same amount of time, the app doesn’t do anything when the EDIT AND FINISH tab is selected. I finally realized that there are mandatory fields in the GROUP section of the details which the app seemed to want entered.
I suggest some message be displayed when entering INDIVIDUAL details and the app thinks there are non-entered mandatory fields, OR all the entry of INDIVIDUAL fields to satisfy the mandatory fields requirement.