I have had quickbooks forever.  I have about 30  PCs.  All have been replaced about every three years. I have a bunch of remote users. It has been happening for many years.   I switched servers over the years.  I started new databases.  It isn't related to anything except a flaw in the program. It is the only constant in my system.  Something triggers the Icon bar to move from the top to the left side when a computer goes to sleep.