We are noticing just recently (maybe since they played with the new Customer & Leads menu) that some new customers do not show up in the Search box on the customers screen.

I can find them if I search for their transactions (top right) and the side bar customers search and also by scrolling through the customer list.  All their transactions show up in "All Sales". But we are frustrated when we cannot find them by searching the main customer search box.  In some cases we have created a duplicate customer and then have to merge them (which then we weirdly can find them).

We have tried incognito, a different browser, clearing cache - with the same results.  I have edited the customer name in several ways, saved, refreshed with no different results.  We typically save the name as LAST NAME, First Name(s).  For a couple we use SMITH, Bob & Jane.  

Does anyone have more suggestions to get the Search field working better in the Sales/Customers page?