I sympathize.  It has made it impossible to pay vendors which is not making anyone happy.  If I have to enter vendor bills to the wrong job then I need to duplicate my efforts when I can go back and change everything once Intuit fixes the problem.  Perhaps, coincidently, Intuit moved the + sign to the left side about the same time.  Maybe if they move it back to the top right it will fix all the problems that QBO is having including - not matching checks on bank feeds and new projects not working at all.