We use that system for customer ID's and have the same issue.  We handle receivables for several clients and each has thousands of customers in our system.  Finding the customer will be extremely time consuming until this issue is fixed.  Of course, I'm not comfortable recording current transactions since we're seeing that the payment history has disappeared, which means January statements can't be processed.  Support says that these issues are general fixed withing 24 hours of being reported, but I see posts from weeks ago and those issues have not been resolved.