I don’t know if this is the same bug, but I invoiced a customer with the full amount of 2 Billable expenses. After invoicing both expenses where Credited on the billable expenses account with the correct invoice number. HOWEVER the account also holds a (non editable) line with in the description the invoice number but with the (Debit) amount of only one of the invoiced billable expenses . Also the Billable expenses - markup account is Credited with the same amount.