I'm resurrecting this thread because I've found a workaround for this bug!
1) The bug happens only with characters that have skipped KoTFE and for various reasons play just one or a few chapters afterwards, for example to complete Zakuul map exploration.
2) The bug doesn't happen if the character starts Chapter I (The Hunt) first: hit the space bar as much as you want, quickly go through the first intro scene, until the tutorial alert pops up, then you can safely exit the chapter and start Chapter X or whatever else you want, and the Overwatch map will update correctly.
