Typed entries disappear when moving between fields in new invoice
When entering invoices, sometimes anything we type in (whether in item, description, rate, etc.) vanishes when advancing to another line or field.
This happens whether we start the invoice as a duplicate of an existing invoice, or as a new invoice from "scratch."
The problem is intermittent. It comes and goes; it is sometimes temporarily solved by resetting the computer, or sometimes by closing and restarting QB. Many times we cannot solve it and simply have to wait until it functions properly again. The problem returns sometimes after entering only a few invoices, and sometimes many hours later.
This is being experienced by two of our three users, on separate computers. We are using QB Desktop 2017 Pro. Our company file is located on a local server and our 3 users access it via LAN. Everyone is running Windows 7 and up.
What is going on? Any help or insight is appreciated.