This is a REALLY annoying thing that has been happening for a long time and drives me crazy....
I am using Chrome as a Browser and find often it populates certain cells on the screen with my login name automatically.
Sometimes it is on a Form.... and usually always the same cell.
Other time it is a one of the Query Filter Cells
See below....

I am assuming it is something to do with auto-fill which is fine for passwords but this is filling with LoginName
Any clues as to how to stop it please?