This has been happening for our team whom has vendor view..  historically (prior to March) they were able to code expenses, checks, and bills to customers accounts to then accounting could add to invoices.  The option to select (Check) the bill box is still available but the customer drop down option is not working, no customers are visible when typing or trying to select from drop down.  I have full access view and I can see customers on drop down view but I need my vendor only viewers to see this to be able to invoice customers for fees paid on their behalf in our service/ agency business.  This is a QuickBooks’s online issue related to an upgrade please add me to the ticket fir correction notice.  (1st Wed-Fri of March broken, fixed the 2nd week, returned 3/15.)