I have had the same issue.  This new "feature" sent an invoice with a totally unprofessional and inappropriate subject line instead of the same generic subject line I had been using for months.  Fortunately, I had copied myself on the email and saw the subject line had been changed.  I immediately sent an apology to my client for the unprofessionalism that QBO added without warning me.

Overall the AI features they have added slow things down more than they help.  When adding an image of an invoice to an expense record, it tries to autofill the fields with the information it gleans.  It takes 30 to 60 seconds to accomplish this and it is incorrect 100% of the time, requiring me to correct the entries instead of just enter them myself.  WORTHLESS.