Unfortunately, my problem is back again.  Cleared the cache on Chrome again today, but I am having the same problem again.  I go to a customer's page and then open an invoice.  I wait. Then the system hangs.  I cannot do anything.  

Other times the invoice will open, however, I notice that although the invoice is opened, the customer name field on the upper left of the invoice is blank, but the rest of the screen is filled in with the customer's info & invoice info.  When I try to save, it tells me I need to select a customer first.  (I usually select a different customer and then back to the customer I was working on, fortunately it doesn't refresh the screen, and I am able to save.)

Wondering if you have heard of this before.  

Thanks,