Settle up "0.00 EUR"

[mx-psi]

When using the app I stumbled upon some odd behavior. At some unknown point it calculated a debt of the form "A owes B 0.00 EUR" that can't be settled up. If the "Settle Up" button is pressed it shows up in the transactions log (once per click) but it does not disappear from the debts list.

My first guess is that it might be due to rounding errors, but since there is no way to see the source of debts I can't say for sure. Provided all parties give consent I have no problem with privately sending the URL corresponding to the event.