I have not seen this. But out of curiosity, are you logged into Standard or Classic desktop? I have seen some issues resolved recently where you have to change the view temporarily to classic, logout, login. Then switch it back, logout, login. And it corrects some issues.
Also, you can use the SY_MENU_UI and click 'Reset' or uncheck it from the menu that way. This is more of a workaround and to be honest not sure how it works in on Standard Desktop view.