Lock simplify debts once payments are made
The "simplify debts" setting should lock down once people start making payments. Alternatively, the person that created the group should be the only person able to change this setting.
Friends and I just had the issue where a large group of us were almost done settling up, but one person turned the setting off, made several payments, and affected people that were already done paying. They now owe more money somehow.
Thanks for the feedback! This makes a lot of sense. We currently lock simplify debts when someone has settled up and then left a group, but I can see how this case is problematic as well.