Thanks. I called tech support and it is a problem with QBO and the engineers are working on it for multiple users. Melio method is too confusing to have another...
This is a new computer and there is no cache to clear. This is not working on EDGE either with another browser. This takes too long to enter it manually again.
Maybe another alternative is to ADD the invoice as a bill. That seems like another step after the PO is issued. However, if it solves the problem of population ...